Funny, my read from that would be not to trust audience scores rather than not to trust critics. Banking on the general populace to have good taste in films/music/books is a recipe for wasting time on a lot of crap.
Ah, but the 'general populace' is not the same as the audience scores on RT. For one thing, the run of the mill cinema attender with questionable taste in art is unlikely to sign up to RT to review movies. Even if
some do, it's unlikely that most unreliable members of the populace will comprise of enough said individuals to obscure an accurate score of the movie.
As for critics. The audience scoring for the above movies was more accurate than the critic reviews. Last Jedi
wasn't a 91% in reality. Captain Marvel
wasn't a 78% in reality. It's highly unlikely that Phoenix is
that much worse than the cookie-cutter Captain Marvel, yet it's slaughtered by critics who don't find the same faults in a movie they lauded, despite them being evident.