"Curation" by a third party is censorship. Curation can only done by oneself.

i think there is a difference when you opt in to curation knowing what to expect. like forums back in the day, you go to a reptile forum you expect pictures of lizards but not cats. nothing against cats, but a cat forum probably wouldn't expect lizards there either... and Moderators clean up the porn spam and the occasional political post that someone on a reptile forum might not care to see either. it's opt in curation, which is self censorship. you're willing to risk missing a nice cat pic, but because you chose this particular reptile forum, you're ok with it. see how some might look at it?