Although many people think that what they learn at school is useless in society, why do they have to learn it? But that's not the case. What you cultivate in school is a kind of ability, not just knowledge. Take mathematics as an example. Do you think what you learned at school is useless in society? That's not true. Now you go out to buy things and settle accounts. Where does your computing power come from? This is what I learned at school. The addition, subtraction, multiplication and division learned in school laid the foundation for your future calculation. Doesn't it count whether you go to the market or not?
You don't know how to calculate money. Secondly, learning mathematics in school is not to let you apply mathematical knowledge in society, but to cultivate your mathematical ability and let you use it to solve any problems in society. For example, mathematics will cultivate your geometric space ability. If you don't know how to solve something in real life, you may have set up a picture to solve it in your mind. This is math ability.
More importantly, learning mathematics knowledge is to lay a good foundation in the future. A lot of profound knowledge is based on mathematics. If you are not good at math, it is almost impossible to learn these advanced knowledge.