Why are people so lazy?

For my paper, I was inspired by the chapter in Finding Flow was about leisure. A big idea that I found interest in was how people choose to do passive activities in their free time rather than activities that would produce more flow. Activities that involve flow involve the mind. They could include athletics, art, reading, etc. Finding Flow has concluded that while the more active activities may be more satisfying, they require a lot more work. People are too lazy to get everything together to do the activity. They think they will be more content watching tv, or doing something that will not require them to put as much effort in to it. So people should be putting in that extra effort to be getting the better satisfatction.