Why do many young people especially advocate "exquisite egoism" now?

From primary school, teachers and textbooks should educate us to think of others, to have ideals and to say that money is not important. . . . Then, as soon as you graduate from school, you hit your head against the wall, until you understand a truth: you are kind and useless, you are beautiful and useless, you are really useless, and if you want money, the relationship between people is ultimately an interest relationship, but the closer the modern society is, the more prominent the nature of this interest is. Only a gentleman loves money and does not violate the moral and legal bottom line. Exquisite egoism is a commendatory term that does not violate morality and intentionally harms the interests of others, but many people are dirty egoism, which defiles the word egoism. Isn't working hard to make a good life for yourself and your family? This is of course altruism, which is understandable. If we are poor and independent, we will help the world. If we are independent, we will be ourselves.