[antonvs]

> That's by definition not how interests work.

It can be. For example, see "enlightened self interest" (https://en.wikipedia.org/wiki/Enlightened_self-interest), a concept that the companies in question seem to discard in favor of short-term profits.

The Golden Rule "do unto others" is an example of this concept, and it answers your question "why would you?"

> And that is roughly fine (albeit a kinder universe would be nice).

You're confusing the status quo with what must be. It's possible for people to have a sane interpretation of self-interest. We should do a better job of reeducating and/or removing from society the people who don't seem capable of that.