I read that rant, and well... it's a typical tumblr rant. Interesting ideas, sure, but not entirely following canon - we already know that the wizarding world could defend themselves against the muggle world, so a whole basilisk sounds a bit overkill (especially since it's hidden in the castle itself, the writer was speaking of using it as Hogwarts' defense monster).
Iiii just don't think the books are nearly as nuanced as the fandom is making them out to be tbh... I mean from a straightforward reading, slytherin is most definitely painted as 'the evil house' and all they have to prove them otherwise in canon is slughorn and regulus black + the redemption of the malfoys
edit: i'm not trying to defend salazar slytherin for killing students, btw. i haven't even read the tumblr post in question because it's a mile long.
Hermione and whatshisface (Nigel?) is not very jock-like in any sense.
well, no, but if we're talking stereotypes... Luna Lovegood doesn't look like a perfectionist either, and cedric diggory was not a very conventional dork if he was one