The operative word for me is "fun." Why in the world would anyone purposely do something that is not fun, if they have a choice in what they are doing? Now, fun is obviously defined in many, many different ways. Different strokes for different folks. At age 71, I don't have time to do things I don't thoroughly enjoy, given the choice and opportunity.
I have (and still do) spend too much time on unavoidable "non-fun" things, generally in response to someone else's agenda over which I have no control, or situations in life where I am forced to participate due to circumstances. All the more reason for bicycling, weightlifting, swimming, stretching, singing to be fun for me.