What‘s the point of making a biologically good decision? That would be a really stupid thing to do. Maybe it‘s a good decision in terms of subjective well being

What‘s the point of making a biologically good decision? That would be a really stupid thing to do. Maybe it‘s a good decision in terms of subjective well being (don‘t know, but pit‘s possible) or for society (quite the opposite I think, but maybe a good argument can be made) but why would you base your decision on what your genes „want“?