Using ‘selfish’ to mean maximising your own utility function also bleeds meaning out of things: by what possible definition would someone not be selfish here?
Someone can fail to maximize their own utility function due to akrasia, irrationality, or incorrect information. (But I agree that “selfish” is an extremely poor choice for a word for that. See e.g. this about “sacrificing one’s own happiness for the sake of others” vs “gaining one’s happiness through the happiness of others”.)
Someone can fail to maximize their own utility function due to akrasia, irrationality, or incorrect information. (But I agree that “selfish” is an extremely poor choice for a word for that. See e.g. this about “sacrificing one’s own happiness for the sake of others” vs “gaining one’s happiness through the happiness of others”.)