I’ve made this point myself in the past. during ‘thriller’, particularly 1983, michael’s work and talent was able to speak for itself. he didn’t need any gimmicks or elaborate publicity stunts. he presented himself as being humble. the album was actually released somewhat quietly. especially in comparison with what was to come after..
it was his belief that all publicity was good publicity, that was a large part of his downfall in my opinion. while I wouldn’t diagnose him with anything, I agree with the examples you listed portraying major ego. I think it actually started earlier than that though..