Pretty much. Stewart’s career really took off post-tng and he would only come back for the films if they gave him more creative input. Same thing with the Picard Show. Look Patrick Stewart is an outstanding actor who has now demonstrated multiple times that he should never EVER be let near a writers room. Its theorized that why we didn’t have a veteran Trek writer for Nemesis, nobody could stand working with Patrick Stewart any more.
There was also a lot of studio interference. That’s why we have Kirk in Generations, because the studio suits didn’t think a Star Trek movie could succeed without Captain Kirk. Suits also wanted each movie to have a Khan-esque villain, which they pretty much failed at every time.