It is a viable argument, and people shouldn't bury such insights given the estimated $9Tn worth of opensource work that was appropriated. =3
Sure, it'd make all the lawyer types nervous for obvious reasons, but that's why you'd also need to be comfortable with the evil deed. But you're correct that the evil plagiarism machine makes it way easier.
Have you seen LLMs build large, stable, pieces of software, that work well, with your own eyes? I have not. I have seen LLMs build small, well-understood things, and I've seen LLMs do super well with extremely well specified problems, but all the rest seems to be marketing (i.e. I couldn't observe or reproduce it).
Edit: I'm not talking about throwaway slop that just needs to run long enough to get funding.
Also, changing license does not prevent you from forking the source code before the change. There are no new libraries with kernel level effort that use uncommon license.
They don't, the companies just replace the software in question.