I think having someone who does their coding at work works better for people later in their career, or who have at least done a good solid couple of years of development professionally. For those early into their profession, I usually recommend people dump as much time as they can while they can to get to that point faster, that way when life changes such as they decide to have kids, or focus energy in other passions instead, they are better prepared to make the transition.

In addition, there is a real danger early in a developer's career that their resume becomes a signal of being a weak developer if they don't put in the effort to progress - I have seen this happen to multiple developers who did not take seriously the need to reach a certain level.

Now to tackle the analogy directly, there is a lot of competition for positions in the music world - musicians have to work pretty hard to get stable jobs, or carve out positions of prestige. The most successful musicians I know do it very often, whether it be arranging songs, practicing their musicianship, and immersing themselves in as many musical communities as possible.