You must have a low bar for human code review. I've seen that in practice too. But I've also been on teams that took code review very seriously, and frontier AI really doesn't come close to a good human code reviewer imo
They're complementary. AI reviewers are bad at spotting inappropriate architecture patterns and unnecessary verbosity, but they're very good at identifying various types of complex logic bugs and detecting mismatches between code docs and implementation. They add substantial value.