In many of those examples, there is payment to the creator of the works that others are learning from. Authors are paid for their books, when we listen to music on the radio the musician is paid royalties, etc. When you lead a team and mentor junior engineers you're being paid for your time.

The nature of the source material matters though. Training a model on open source software seems perfectly fair - it has explicitly been released to the public, and learning from the code has never been a contested use.

IMO the questions around coding models should be seen as less about LLMs and more as a subset of the conversation about large companies driving immense profits from the work of volunteers on open-source projects, i.e. it's more about open source than AI.