I like this example about the man and work. Why does the man find value in what work gives him in return? Because he feels he needs those things, he can still

I like this example about the man and work. Why does the man find value in what work gives him in return? Because he feels he needs those things, he can still make the choice not to get them but why would have this choice in the first place, why do those things appeal to him? The same as how a dog will choose to jump when you train him to expect treats, he could just ignore it but someone he'll do it because treats taste good. Why they taste good is I believe something that is honed by evolution. (Same as how we like things with Fat in it. Fatty stuff taste good for a reason.)