Because no one owes you a job you like? It's great if what you're good at is what others are looking for. But outside of tech and math that's often a rare proposition.
I agree but for many the freedom of choice falls short when facing bills. Then one has to work on whatever pays their bills and it's exhausting enough to make the dream even harder.
I consider myself incredibly fortunate to be able to work mostly in greenfield projects. I worked really hard to get here and keep working hard to stay here.
You do owe labor in return for money though, unless you're an entitled tech or crypto bro who has grown up in a bubble without any understanding of how the other 99% of people live their lives (by just scraping by).