But they increased profits by intentionally misleading people and getting them hooked on unhealthy food. They helped themselves by hurting others. In plain English, we'd call that evil.
Let's admit that legal, profit seeking behavior, can sometimes be evil.
Furthermore, there's nothing ridiculous with going after bad actors in the past. I agree the main focus should be on companies doing harm in the present. But holding past actions to account sends the message that you can't get away with harming customers forever. It's a deterrent.