I basically agree. "Selfish" is a sloppy word that combines unlike things. Which means it's a toxic word. People should be self-interested. We are organisms,

I basically agree. "Selfish" is a sloppy word that combines unlike things. Which means it's a toxic word. People should be self-interested. We are organisms, after all. Like animals. However, people should not be fixated on their own self-interest to the point that they neglect the bigger picture. If you neglect the bigger picture, you will not be successful at being self-interested. For example, if you neglect your spouse's feelings, people will say you're being "selfish." But you aren't being self-interested, because you aren't promoting a good life for yourself. For a good critique of altruism, which is really a separate topic, see Ayn Rand.