I said “generally very mediocre” movies. That doesn’t mean it’s all bad or all bland just that even his best movies are only slightly above average. What critics call journeyman directors. His best movies like Apollo 13 or Splash are good genre entertainment but I don’t know if either is a great movie. And his career has fallen hard lately thanks to making Oscar fare like Hillbilly elegy, Cinderella man, a beautiful mind neither of which is good or interesting.
His movies are generally well cast so I will give him that. Arrested Development is like his biggest contribution to entertainment lately and even that is basically a tv version of Wes Anderson’s The Royal Tennenbaums in terms of setting and characters.
It’s not a big risk because Marvel invests so much behind the line in terms of pre viz and second unit, who handle the fight scenes and action before the director arrives on set. So a director doesn’t do about most of the work they are supposed to do on a movie like this.
Spielberg for instance designs and storyboards(the old word for pre viz) all his shots and stages action and designs it by himself. George Miller did the same on Mad Max movies. David Fincher same thing. As a negative example, Michael Bay too.