What's the dumbest Harry Potter lore part, and why is it the moving stairs?

@LukeAlmighty nothing tops the dumb time travel things given out to kids that also got destroyed entirely in the next book.

Or the fact - I kid you not - that wizards didn’t use toilets or latrines, they just dumped wherever and magicked it away like wtf, even cavemen picked designated holes and buried their crap iirc.

@RehnSturm256 @LukeAlmighty was the toilet thing in the books? I thought that was just a bad answer from years of Rowling Q&A

Time travel's right in the first book, but I never read any of the others to see it get destroyed.