I think like most hypothetical discussions, the commenters proposing these ideas aren’t interested in practical versions of the idea with tradeoffs. They imagine a perfect version of it in their minds with no downsides that accomplishes everything they want.
The demand for professional licensure doesn’t even make sense in this context. Is professional licensing supposed to stop developers from naming their packages names that LLMs produce? Is it going to force the package repos to check that everyone has a professional license before submitting packages from the United States (or other countries with licensure)? Can it be worked around by changing your country in the drop-down box to a country that doesn’t have licensing?
The calls for software licensure never seem to take into account the global nature of the Internet and software development.