>>213321595 (OP)
Because he was "The Hero" and a perfect version of it.
His story in the OT was perfectly executed. He was the ultimate good guy. And he won, in the end, by refusing to slay his father.
I don't know if it's KK, if it's the revolving chair of little hat CEOs, or if it's any number of the neo-feminists, their "male allies," or Minoritieam members. But they cannot allow Luke any screentime or advertising, because suddenly White Men take center stage once again.
I mean, look at what happened in the season finale of Mandalorian S2: Luke saved the day and sent every Star Wars fan into a frenzy. Even people who AREN'T fans of Stars Wars tuned in, even if they didn't watch The Mandalorian.
TL;DR
The new owners of Star Wars want to have a new face of the franchise that is not a White Male Hero. They are fine with a white male being a villain, but they've desperately tried to fill the Hero Face role with anyone that isn't Luke, or his archetype.