Knowing that farming does not make money, why do farmers work hard every year?

This is influenced by China's long-term farming culture. Farmers have never left the land since ancient times, guarding their own acres of land. Farmers go out to do farm work with farm tools in the early morning, then go home for breakfast as soon as the sun rises, and then go out for lunch at noon. In the evening, they bring farm tools home to make a fire and have dinner. Day after day, they get used to this way of life. Although the income is not much, I am used to it.