An argument can be made that all actions people take are for their own self-interest. Even things like helping the community is done for reciprocal benefits for yourself plus the general increase in respect.
Another point is that if all people just act for their own self-interest, they will have a better life themselves, and if everyone does the same, some sort of proper balance will be achieved.
I have been having some occasional discussions with my friends over this. I personally disagree, but would love to hear what others have to say. Feel free to discuss!
The contextual and memetic aspect of what constitutes a “person’s self interest” far outweights the person’s actual decision and the individual actor cannot be removed cleanly from the wider discussion envelopping what this “self-interest” even is.
The “law” and its detterence logic shapes what “self-interest” is. Talkibg heads shape your understanding of reality and anchor what your self-interest is and means.
Nobody has self-interests in a vacuum.