There has been good MCU content that actually has coherence - Agents of Shield, She-Hulk, Loki - but they’ve effectively had Showrunners.
Why Marvel thought it was optional, and everything could be fixed with editing in post is bizarre, but I’d argue that they’re just at the extreme end of a continuum.
Even with showrunners, some of the early seasons of the new era of Star Trek seems to have fallen into the same trap. To many big ego EPs each doing what they want and Kurtzman trying smooth it all out with editing in post.
Osunsami has kept coherence in the direction of Discovery in Toronto, but Picard season one and two was all over the place, frequently ignoring the tone laid down by Hanelle Culpepper in the pilot.