From the
Rise of Skywalker Spoiler discussion thread:
As you've just pointed out, in those other examples, the failure was an important part of the character's development. It was meant to be painful lesson for Poe to care about the wellbeing of those under his command and not blindly sacrifice his troops for the sake of completing missions. Otherwise they'd be no better than the First Order who treat their soldiers as entirely expendable resources (and strips them of their humanity). I'm not entirely sure what Finn and Rose's personal journeys were with the Canto Bite scene, and especially if it was worth the narrative diversion.
I wasn't entirely satisfied with Poe's journey either... the whole mutiny side-plot seemed unnecessary. I get that it's telling us that he's trying to grow and learn as a leader, but they already accomplished that with the Dreadnought bombing scene. Extending it with the mutiny thing seemed unnecessary (again, less is more) and also illogical from a story POV. Why didn't Leia and Holdo just
tell Poe what the plan was? Especially when he had guns pointed at Holdo. We see that when Poe discovers Holdo's plan he actually thinks it's a good one and wholeheartedly agrees with it. Why didn't they just do this from the beginning? Geez...