Is philosophy good for us? “ Far from establishing a rational consensus about what is morally right, and about what the ground and meaning of this rightness is, moral philosophers have produced a perplexing array of possible moral systems—consequentialist, deontological, con- tractualist, virtue ethical, you name it—but no agreed method to decide which of these system is the sound one. Indeed, it is even controversial what ‘soundness’ here is tantamount to, whether moral judgments can be true in the same sense as factual judgments, and true independently of our affective or conative attitudes, or whether moral judgments are merely non-cognitive expressions of such attitudes.
If it had not been for the fact that moral philosophy is often too esoteric to be grasped by the public, the substantial disagreement that is raging among its practitioners might have had a deleterious effect on public morality. Philosophical disputes about the foundation and content of morality might have eroded the authority that common-sense morality has acquired over centuries as a result of the exposure effect, and weakened the motivation to abide by it.
It seems unlikely that this substantial disagreement will subside, for even though our moral responses must converge to some extent if we are to be able to live together in functioning societies—which is a pre-requisite of our evolutionary success—they are surely not so finely attuned that we should expect them to converge with respect to the manifold of fanciful scenarios that our philosophically trained cognitive powers could construct.
http://www.jpe.ox.ac.uk/wp-content/uploads/2018/06/JPE0049-Persson-1.pdf