You have use for it. Just as you have use of morals, praise, and a concept of self. But for it to be even a suggestion, or that you hold it as a value, it implies you believe in it to a degree. Anyways, humans can't stop being humans. Even if all creatures with a concept of self were deluded for example, they would not be able to cease to have that concept.
You can't function without the belief in "should" even if it is relative and not universal. You need it as much as any other human. But the question is, does it really hold as possible under naturalism?
You can't function without the belief in "should" even if it is relative and not universal. You need it as much as any other human. But the question is, does it really hold as possible under naturalism?