That much diversity is definitely possible - my mom and dad are both Pottermore-Sorted Gryffs (…although I would’ve put my mom in Hufflepuff and had my dad somewhere along the Slyth/Gryff spectrum…probably Gryff, tbh, but definitely a Hatstall) and I’m a Ravenclaw; my cousins are Slyth and a Gryff/Puff Hatstall who chose Gryff…I would definitely think that families IRL tend to show more diversity.
This is twofold: I think that JKR assumes families will instill in their children the same values that they themselves hold, resulting in Gryffs producing Gryff children unless those children rebel (like Sirius rebelling against his Slytherin family), and also that there’s going to be a certain amount of House pride resulting in the children of Gryffs wanting to be Gryffs themselves (Ron and probably mostly all of the Weasley children; Draco’s disgusted “I think I’d leave” and determination for Slytherin.) There would also be pressure in certain families to get a specific House.
I think that there’s some merit to there being more continuity in the Wizarding World - I do think that there would be the alumni issue - but I also think that the whole “usually runs in families” thing would not be quite as strong as it is in the books, especially because I’m assuming inter-House marriages are much more common than portrayed in the books. (Ted/Andromeda is presumably one such marriage; Neville/Hannah and Remus/Tonks are the other two, although technically Neville/Hannah isn’t in the books and Tonks’s House is never named in-series. Fleur went to a non-Hogwarts school so I’m not counting Bill/Fleur. If it does run in families, there’s the possibility of Luna/Lorcan being a Claw/Puff marriage, but that’s way too speculative and also outside of the books. In-text, we have Molly/Arthur, James/Lily, Narcissa/Lucius, basically any of the Black or pureblood marriages, Harry/Ginny, Ron/Hermione, George/Angelina, presumably Draco/Astoria…but I would tend to think that people would marry outside their House more often than they marry within, just because of averages. You could argue that people are more likely to marry people with similar values, increasing the frequency of same-House marriages, or that people who meet in school are more likely to marry people of the same House, but in general I’d think that most people meet the person they’re going to marry post-Hogwarts and that House wouldn’t come up. )
Anyway, I think that in-world marriages between different Houses are more common than what we saw in canon, and that therefore you’d probably have kids born of Gryffinclaw or Gryffinpuff or various marriages where it can’t entirely run in families, or where having parents from 2 different Houses makes you feel better about entering a third.
So…yeah, I do think that the whole “runs in families” thing is a bit overrated, but I do think that there would be families where alumni pride was strong or where kids felt pressured - particularly in Wizarding families where both parents were of the same House and really loved their time at Hogwarts. Growing up hearing stories of Ravenclaw Tower, the enchanted eagle knocker, the fun times spent with classmates, secret House customs…all of that would incline a kid to want to be Ravenclaw because of all the good things about it. (Or you might have a Slyth family whose child has only heard terrible things about the Gryff rivals and wouldn’t want the House, etc.) So the Wizarding World is more likely than the real world to produce less-diversified Sortings, but only in some cases.
(Basically, IRL we’re all Muggle-borns and generally don’t have parents telling us how awesome one House is; we also don’t have parental or sibling pressure to get a House, or too many preconceived notions/rivalries/etc. I suppose you could say that larger fandom’s predilection to Gryffindor is like growing up with Harry as a parent, telling us how awesome Gryffindor is, and that the people who automatically think Gryff is the best because of it reflect the kids in the Wizarding World who would go in wanting Gryff because of that. And then you have the ones who rebel and choose Slytherin like Sirius, or the people who read more about the other Houses and decide those would be better for them…that’s really the closest analogy we have to being non-Muggle-borns being Sorted in the WW.)
it’s really funny bc like listening to english majors talk about their classes or projects theyre really articulate and they use complex words and stuff and it’s very prestigious sounding and then you listen to science majors and if theyre just talking amongst themselves it sounds more like “yeah i put the compound in the thing and honestly i was hoping for a little boom but all i got was a sizzle i dont know what i did wrong.”
“Because that’s the thing about Scooby-Doo: The bad guys in every episode aren’t monsters, they’re liars.
I can’t imagine how scandalized those critics who were relieved to have something that was mild enough to not excite their kids would’ve been if they’d stopped for a second and realized what was actually going on. The very first rule of Scooby-Doo, the single premise that sits at the heart of their adventures, is that the world is full of grown-ups who lie to kids, and that it’s up to those kids to figure out what those lies are and call them on it, even if there are other adults who believe those lies with every fiber of their being. And the way that you win isn’t through supernatural powers, or even through fighting. The way that you win is by doing the most dangerous thing that any person being lied to by someone in power can do: You think.”