There is a popular theory about Saturn returns killing young stars at the age of 27-28. But I don't believe in astrology because of religious reasons so my opinion is different. I believe the deaths happen because musicians do not have a healthy lifestyle and a lot of drugs, extreme diets and all the partying catches up to them in their 50s. Like, look at MJ. There is nothing really surprising about his death because his lifestyle was unhealthy. He probably suffered from an eating disorder because many of his staff and acquaintances have talked about how little he ate and how conscious he was about his body. There are stories about him collapsing during rehearsals and after his concerts because of dehydration, low blood pressure, extreme fatigue. His concerts were high energy and if he wasn't eating enough before them this is a recipe for health hazard. He stopped singing live and touring after the HiStory world tour because touring wasn't possible with his lifestyle. Not to mention all the stress that he had to deal with being such a huge star who was constantly in the spotlight and always being heavily scrutinized by the media and after Thriller music critics started to criticise his musical output too saying he was stagnating and stuck to one style without experimenting.
He didn't really have a good life and I roll my eyes when Kpop fans want their favourites to become the next MJ. No, you shouldn't wish that for them. He didn't have a good life and wasn't as critically acclaimed and respected as he is now during his life. In his life he was mocked and his music post bad isn't even considered that good by critics.