I see a parallel between Disney SW and MOTU / He-Man.
The purpose of entertainment is for us to find an escape from reality. When something happens in the story which causes us to lose immersion in the story, then it is poor story telling. (Example: In one of the X-Wing novels, Lando Calarisian introduces Wedge Antilles to an exotic drink called... "Hot Chocolate." I kid you not! Another example: the all women of the MCU scene in Endgame - even in the movie theater my wife and I looked at each other instead of the movie because it was so blatantly obvious the MCU was getting their "women of the MCU" still shot.)
A big part of story telling is meeting or exceeding certain expectations, especially with beloved characters. This is why Luke's appearance in the Mandalorian was such a hit. It was Vader at the end of Rogue One but turned up to an 8. (9 would have been against that many live opponents, 10 would have been against a Sith).
If Disney had killed Luke in SW VII, the fan base would have lost it right off the bat. Even JJ has admitted in interviews there was no way to introduce Luke in SW VII without him taking over the focus of the movie. Instead, JJ gave everyone hope by introducing him at the very end of SW VII. JJ effectively punted Luke to Rian.
Sadly Rian Johnson didn't simply kill Luke, that would have been merciful. Instead, he destroyed Luke's character (not to mention Luke milking that stupid see cow is now a meme that will live forever - thx Rian) and then he "killed" Luke. That is when a lot of fans kind of lost it. That is the parallel I see to MOTU and He-Man.
Rather than letting He-Man dominate on screen or instead send He-Man on a quest off-screen, Kevin Smith opted to kill him. I have yet to hear a valid explanation of why He-Man "had to die" as opposed to "not be present" in order to accomplish the same storyline. Smith trashed the expectations of the fan base by sacrificing He-Man. How he cannot see the impact that had on the fanbase I think is the ultimate tell that he was never a fan of MOTU. I know he said he was but I have seen an interview he did many years ago in which he stated he had never been a fan of MOTU.
Sadly, there are interviews with several primary leaders in Lucasfilm stating that they had never been fans of Star Wars either. *sigh*
Here is a novel idea - why not create NEW stories with NEW characters. Manga seems to be doing a great job. That's all my kids read at this point. My daughter is even writing her own fan fiction and creating dozens of NEW characters for her stories. If a 15 yr old can do it, surely some grown ups making the big bucks can too.