When LLMs are based on stolen work and violate GPL terms, which should be already illegal, it's very much okay to be furious about the fact that they additionally ruin respective business models of open source, thanks to which they are possible in the guest place.
>“Free software” means software that respects users' freedom and community. Roughly, it means that the users have the freedom to run, copy, distribute, study, change and improve the software.
https://www.gnu.org/philosophy/free-sw.html
Being able to learn from the code is a core part of the ideology embedded into the GPL. Not only that, but LLMs learning from code is fair use.
> the fact that they additionally ruin respective business models of open source
The what now? Open source doesn't have a business model, it's all about the licensing.
FOSS is about making code available to others, for any purpose, and that still works the same as 20 years ago when I got started. Some seem to wake up to what "for any purpose" actually mean, but for many of us that's quite the point, that we don't make choices for others.