I don't really see how this applies to the usefulness of film critics.

To me at least, there are the movies I like. It is my assumption that there is more that groups these movies than just me liking them. I look to knowledgeable critics to define the elements that unite movies I like; which are, with good odds, movie elements that I like, and then to those critics to find new/other movies that I have not seen but have those elements and presumably I would enjoy.

popular opinion/general audiences typically can't define why they like what they like. Someone saying "I liked Top Gun because it's cool" tells me nothing about if it'd be a movie I'm likely to enjoy and then spend my time watching.

But I don't read film critics that call people stupid for not liking the movies they consider good so maybe that's the disconnect between this post and I. Youtube reaction bait incendiary critics are trying to get engagement more than they're trying to consider movies