[mezentius]

You’re describing something real; I’m a screenwriter and have worked on studio films where this kind of character arc was encouraged. (I wouldn’t call it a distinct structure because it can be mapped onto a very similar, traditional three-part framework.) It is, however, very much not an artistic decision. The reason for the prevalence of this arc in expensive, family-oriented movies is because studio executives (or worse, the CEs at production companies) are uncomfortable with characters who make bad choices, and think audiences will reject them. Maybe they’re not wrong— but this is a relatively recent development and one of the thousand reasons why movies have become so boring.

More satisfying (in my opinion) arcs tend to follow a psychoanalytic path: a character with some unaddressed pathological issue ends up in a serious crisis. The crisis forces them to acknowledge the issue and change slightly. The difference between a comedy and a tragedy is that in a tragedy, the change happens too late. (An interesting variant in tragedy is that the change happens in time, but unexpectedly turns out for the worse—think of the end of The Godfather.)