The idea that the provenance of a given tool's code inherently pollutes the material it's used with seems kind of illogical. Wouldn't it follow from this premise that any code written using open source IDEs and debugged with open source debuggers and other tooling would itself then be considered copyleft? Are works written with LibreOffice not copyrightable?

There's obviously a huge issue with the legitimacy and ownership of training data being fed to LLMs. That seems like an issue between the owners of that IP and the people training the models and selling them as services more than the people using the tool. Isn't this just another flavor of SCO trying to extort money out of companies using Linux?