If copying by AI is generally found to be fair use then we will see this in music, porn, advertisement, in political associated situations, and other situations where authors has a history of disagreeing with how their work get used. Unstable diffusion is an ongoing test of how far fair use may be applied.

I find it very likely that copyright law will be changed if training on copyrighted material becomes universally allowed under fair use. The alternative is that training on software code is allowed, but training on images/videos/music is not, which I do not find likely.

> Second, the only aspects of code that needs to follow the license are the parts of the code that are covered by copyright

The legal system don't generally work that ways. The questions judges tend to look at is if the accused party can be reasonable said to have copied someone else work without permission. We can look at either napster or the pirate bay court cases and see how low priority judges tend to view arguments that rely exclusively on a technical detail (A torrent file is not the same as a movie!).