Every job includes a large amount of secondary work that needs to be done in support of the primary work. Sometimes the primary work is fun and the secondary work is a chore. Sometimes it's all fun. Sometimes it's all a chore.
I write software for a living, and occasionally I get sick of all the secondary work and politics, and wish I'd found another career and kept software as a hobby. Then I realize that working doesn't leave much time for hobbies, and I get paid well to do something I enjoy, and the secondary work is a small burden to get paid for the parts I still like.
There's also the simple fact that if you want to work on any sufficiently complex software, even as a hobby, you're still going to have to work on build scripts and tooling, unless you like repeating yourself and doing things the hard way.
I'm sure artists, auto mechanics, writers, and surfers all have plenty of chores to do, whether they're professionals or hobbyists.