As with anything, you gotta ask "who pays the bills."

I don't know as much about movie/TV journalism, but I do know a bit more about the games industry. And in that industry, it's not the consumers who pay the bills for the reviewers, it's the game publishers and developers. Because they pay the ad revenues and they control who gets access to early review copies and exclusive events.

So if movie/TV critics are anything like that, then their job is to please the Hollywood execs, not provide accurate information to consumers.