There's a pretty good argument for that in a lot of other cases too, however those on the top doesn't want it, or at least not in a sensible way, see the whole "UBI through stock exchange" and "Universal Basic Compute" fiasco.
I personally don't care if someone "steals" my code (Here's my profile if you want to do so: https://github.com/ZILtoid1991 ), however it can mean some mixture of two things:
China is getting ready for war, which will mean the US will try its best to block technology, including open source projects.
China is planning to block GitHub due to it being able to host information the Chinese government might not like.
Of course it could mean totally unrelated stuff too (e.g. just your typical anti-China and/or anti-communist paranoia sells political points).
Creative de-facto monopolized the industry often by unethical means (suing Aureal into bankruptcy, etc.), not letting much room for competitors, which in turn lead to diminishing quality on the part of Creative.
Microsoft didn't put hardware acceleration support into XAudio, which superseeded DirectSound.
Game publishers realized the vast majority of gamers didn't care about sound quality, so they could spent those resources on making the games look a little bit more realistic.
No thanks, I don't want to spend days troubleshooting issues with cross compilation, differences between Wine and actual Windows, struggling with the tty-only debugger (I want my debugger to do things on button presses, not by complicated scripts), etc.
Skill issue.
Oh, here comes the gatekeeper protecting their operating system from the "normies"!🤣
GPL code is the least concern, you can always just say the AI-generated code is GPL. What about training on leaked proprietary code? The training data already known to include medical records, CSAM, etc., wouldn't be surprised if it also contained proprietary code.
One problem: not compatible with Windows. Of course you can use Wine and similar stuff, but isn't 100%, especially not when you're developing for Windows. Also there's the issue of NVidia drivers (I won't sell/throw into the trash my GTX1050 just because NVidia doesn't want to make their drivers open source), and also a lot of pro audio stuff isn't available on Linux.