I think after the movie came out, people did a little digging and discovered Leanord Nemoy had a dark room where he developed amateur nude photography. They tried to normalize that behavior by faking that he already released an art book in the nineties but it didn't look good. The 'propaganda machine' may have decided to kill anton Yelchin to both help cover up the story, and because Anton's hair line was receeding and he decided not to use a toupee, and it was too late, as if he started then, his hair line would have been frozen awkwardly, or he would have had to disappear for a long while. This caused a certain level of stress that may have unraveled his nerves, and made him an insurance rates adjustment nightmare for the studio.