I get nothing but nice comments on my videos but I still think it's valid for a creator to turn them off if they want to. As a fan, I love being able to communicate directly with producers but I can't begrudge someone who just wants to make stuff and put it out into the world and hope someone likes it.
(Though, yeah, being able to report technical glitches is a good thing.)
P.S.: I mean, I wouldn't turn them off because I crave the validation, but I'm just an inherently flawed human being, so...