So, you don’t really care about the rights of others, as any sort of moral imperative, but only because you believe it will serve your own utilitarian self-interest.
I mean, why else would you care about “society”?
How about the rights of those who aren’t “in a position to contribute to the full extent of their ability”?
How about the rights of those who cannot contribute anything at all?
Are they disposable?
Why not?
I care about them plenty. Though let’s be honest, the “moral imperative” is still utilitarian, you want to be judged by God a good person and get to go to heaven when you die. I want to be judged by myself a good person so I can look myself in the mirror every morning when I shave.
I’m in a society, and my life works better when it works better.
Everybody is in a position to contribute to the full extent of their ability. That’s the nature of the phrase. Now what that full extent is varies from person to person but we all can do something.