For example, someone close to me expressed support for the "Proud Boys." This person in particular has been duped by evangelical movements in the past that all have one curious detail in common: they prohibit masturbation. Half to make fun of him, half to help him, I wanted to share a link with him to the Proud Boy's official website because he wouldn't believe me when I said they ban jackin' it. Facebook Messenger (in private DMs) refused to send a message including the link. "Send failed. Operation could not be completed." I tried an archive.org archive of it, same thing.
At least TPB adds value to peoples lives.
This isn't a rhetorical question of course. There are major arguments for both. But I think a pretty good chunk of DDG users were more often after the library index than what ideally would be a librarian recommendation, but in reality is more like a stereotypical used car salesman style recommendation.
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.