The problem with getting good at a game, especially one with big rewards, is you continue playing it long after you should have outgrown it. Survival and replication drive put us on the work treadmill. Hedonic adaptation keeps us there. The trick is knowing when to jump off and play instead.

The joy and enrichment you could derive from a single musical instrument, or a set of paints, is enough to fill a lifetime, and many people have demonstrated that. But those deeper levels are effectively inaccessible without some limit to the splitting of your attention and interest.