I might agree with shite. Or I might wish to read it for my own amusement. Or perhaps I want to argue against the shite, in which case, I need to know what shite is out there. In any case, it doesn't matter. I only need the search engine to be an intermediary, not a curator.

Besides, if someone accidentally searches for shite, he can revise his search terms. Just like how you might reword something if a listener was confused.

This "curation" just doesn't need to exist. But that's a moral argument and those applying censorship aren't moral, so won't be partial to it.