The problem is you can’t really define what is “good for society”. Maybe I think weird abstract art is good for society, whereas most people think it’s a waste of time.

Who gets to decide?

That’s an extreme example, but there are many such types of cases. Is a cash advance place “good for society”? It scams poor people but also provides them a line of credit that banks will not.

What about used car dealerships that sell overpriced cars at high interest? Is that “good”? Poor people get scammed but it gets them a car they otherwise would not be able to get a higher end dealership.

As for what I would do? Probably just contribute to open source projects or something.