I can't read the article because of the paywall (signup-wall?), but I can think of at least one (more?) reason for this state of affairs: in animation, at least some of the films still have original ideas. Whereas live-action movies designed with mass appeal in mind are mostly continuations or reboots of long-established (and tired) franchises (MCU/DC Comics, Harry Potter, Game of Thrones, Star Wars, Mission Impossible, Jurassic Park etc. etc.), or adaptations of video games, musicals or (if you're lucky) books.
I notice I’m a huge hypocrite in this area. I always complain to people that there are too many remakes but then given a line up of movies in theatres, I end up begrudging paying for the remake.
Sometimes due to peer pressure of the group I’m with, sometimes due to the fact that they’re guaranteed to be an okay time.
The most recent non remake I watched was hamnet, and basically the whole thing went over my head.
I just watched "Good luck, Have fun, Don't die" and I'll put it up as an example of an original story. Definitely of the gestalt, but original.
If I wanted to start an argument, I'd say that any movie where more than 50% of the frames are more than 50% CGI should be counted as "animation". Which covers most of those franchises.
I don't know which cinemas you frequent, but the movie world is much richer than the n-th instance of a MCU film or Star Wars. Of the 20 or so movies I watch on big screen every year, only 2 or 3 are of that type.