But there is no greater pleasure than to finish something, deliver it, get users in front of it, and get feedback you never expected from either grumpy or happy users. I think it's way more rewarding to try to work for profit, because while money is nice, profit also means it's so useful someone is ready to give you credit for future work (money) for what you did.
Not a universal experience. I receive little joy in money, beyond the basic needs it relieves. Shutting down a business that cleared $800M profit annul. was the best decision I ever made.
Profit doesn't inherently mean you've made the median experience of individual humans better, and is just as often to effect significant degradation. My biz was slightly on the positive, but I could have pegged an extra zero in profit if I had forgone scruples.