

As other comments have said, “Altruism is the concern for the well-being of others, independently of personal benefit or reciprocity.” To be true to the definition, one wouldn’t seek worth from altruistic actions. If one did however, that’s called being a calculating person.
Anyway, altruism rarely is seen positively in the real world because there’s no worth to be found beyond the deed itself.
I think it’s connected to unregulated capitalism in the eyes of its opponents here.