Every time I read a story like this, I console myself with the fact that there are decent rich people out there like Warren Buffett, Mackenzie Scott, and George Lucas. (Bill Gates is on the fence; it's hard to forgive him for the Linux Wars.)
I'm a fan of Buffet, but you can easily say he is a 'bad' billionaire. He makes profits (and a lot of them) by pushing Coke and other unhealthy things on the masses. You could argue that buffet directly funds a significant percentage of diabetes cases in the world. You can say similar things about the others
Allowing unhealthy food to be produced seems like a problem our government should solve, not private industry. Businesses should be allowed to work within the confines of the boundaries we establish - i.e., the law.