Its the latest step made by a cabal of awful Star Wars fans, who have petitioned to have The Last Jedi thrown out of the Star Wars canon. Those fans are mad about several different things, including the movies treatment of Luke Skywalker (Mark Hamill), but also contains (or is made up of) a contingent of fans who are mad about the social justice warrior tack the recent movies have taken.
Movie's unfair treatment of Mark Hamill = not killing him off?
Really, if you hate what's become of Star Wars there are dozens of SF franchises to choose from.