I can agree with everything you just said, but there’s a bit of a misconception of what free speech means tied up in this. The government isn’t claiming ownership. Freedom of speech is a protection the government offers to protect citizens against itself, and the government defines what freedom of speech means. It’s probably best to leave copyright aside, introducing that now and mixing it up with free speech is going to muddy the discussion. This isn’t a copyright issue.
It doesn’t matter if I independently invent nuclear weapons, I’m still not currently allowed to open source them for other people, possibly in other countries, to use. That isn’t because the government thinks they own my ideas, it’s because the government believes that sharing information on how to build nuclear weapons is bad for us and threatens our safety. (Edit) BTW, it’s also important here to recognize that claiming “independent” invention is risky and problematic, if you received any benefit from your environment in the form of education, ideas, collaborators, parts, market conditions, etc. There are very few, if any, truly independent inventions.
Note I’m not making any arguments on whether ITAR should or should not be classified. What I’m pointing out is that that is what needs to be debated - whether ITAR is classifiable (or otherwise export controlled), and this isn’t otherwise an issue of free speech failing to be absolute. It’s a simple fact that freedom of speech is not absolute, and therefore demonstrating perceived abuses needs to be demonstrated based on the specifics of the case. Why should ITAR be declassified/open? That’s what needs to be shown.
> The government shouldn’t be able to classify scientific information that the public is able to discover on their own
Why? I don’t necessarily agree with this.