The better we get at some things, the more we want to do it. Conversely, the worse we fare in other domains, the less we want to work at it.

If we see our engagement as a way of getting rewards (money, respect, achievement, or just fun) for the time we invest, it can create a trap. The better you get at some things, the narrower your set of interests and hobbies may become.

Our modern society is the product of specialization. Albert Einstein may have been less able to come up with general relativity if he also had to grow his own food and sew his own clothes. Perhaps time constraints would have prevented him from reaching the depths of thinking required. If we enjoy one thing above another, there isn't a problem.

We can also enjoy learning lots of other things that may be more satisfying and interesting than narrow specialization.