I don’t think the notion of self-worth is rejected by Buddha. I think the expectation of achieving it through actions is rejected. The expected results are the problem not self-worth or actions.
True, but it’s harder to run around with a begging bowl in Western cultures. Even though self worth is an illusion, right livelihood is part of the Noble Eightfold Path.
I was very unBuddha while pursuing what currently enables my lack of expectations. I’m just discovering acting on the world with no expectations of what is next.