知識は別の知識を得るための前提条件
Linear Algebra is a prerequisite for gaining benefits from linear algebra. People who don't understand linear algebra won't be able to benefit from it. Similarly, people who don't understand the tax system may not realize that they can receive money through tax refunds and end up throwing away money. And those who don't understand the workings of the economy may lose money through mediocre financial products. In general, it can be said that "Knowledge is lost on those who lack knowledge." Furthermore, people without knowledge are unable to understand how much they are losing due to their lack of knowledge. Therefore, they may look at others who are acquiring knowledge and wonder why they are putting so much effort into it, as if it doesn't concern them. The reason is that it is beneficial.
There are also cases where people say, "I do it because it's interesting," which is a benefit in itself because it allows them to spend time in a good mood.
Some people may not see how knowledge of linear algebra can lead to profits. However, Knowledge is a prerequisite for acquiring other knowledge, and by repeating this process, there can be profits in the end. https://gyazo.com/d838a5b25996c7b9453cb1bda7d0ebcf
If there were a button that said, "By pressing this button, you will never be able to learn linear algebra or understand its benefits, but your grandfather will become the prime minister," pressing the button would have a higher expected value. This is because the knowledge gained through that environment is scarce and has high barriers to entry that others cannot easily obtain.