What a straw man. No one who "is not an expert on taste" says all the restaurants taste the same and it's all just subjective". Well, ok, maybe people who literally can't taste (I know one such person), but the people who can taste don't ever say anything like that.

Most of us don't actually use restaurant guides, and we don't say "wow that was awesome" unironically when we didn't like it but the "experts" told us otherwise.

Aesthetics is fairly subjective, yes.