Corporations are not people. What a single person does while not affecting anyone else is nobody’s business, but what companies do affects a lot of people, hence it is other peoples’ business.
I wish that were true, but in the US at least[1], it isn't cut and dried.
1: https://en.wikipedia.org/wiki/Corporate_personhood#In_the_Un...
This is simplistic thinking. Companies can’t do anything. People do things, sometimes as a functioning part of an organization. Companies don’t decide to cut down trees for profit, people decide to take that action. When you say “a company is damaging the environment” you’re allowing a person to hide anonymously under the veil of a legal entity. Companies can’t do anything. Only people do things.