This world may not protect you because you are valuable, but it often consumes you because you are valuable. Many people are taught from a young age to become useful, so they desperately try to prove their abilities, sense of responsibility, and reliability, but few tell them that when a person's value is long based on satisfying others' needs, they will also gradually become an object of demand and consumption. The real danger has never been excellence, but rather having nothing left besides excellence; not being valuable, but having all your value come from being used. When a person is used to giving, taking on responsibilities, and solving problems, others will take all of this for granted, and they themselves will lose boundaries in the process of constantly meeting external expectations. The so-called "useless usefulness" is not about rejecting growth, but about reserving those parts that cannot be exploited, priced, or fully possessed. Because the best state of a person is not to live as a tool, but to retain the rights to choose, refuse, and stay true to oneself while possessing value.