No, it's rude and weird to chastise someone for rightfully advocating treatment. He didn't state that he didn't want to risk the horrors of treatment with the end result being the same -- he spread disinformation. It is good he died, because when others repeat his disinformation, we can point back at his death as evidence against his beliefs.
You weigh the feelings of a dead billionaire higher than the lives of young people with hopes and dreams.