Nothing in my sentence constrains my ability to teach someone else the stuff I learned, though! In fact, the first amendment makes it pretty damn clear that nothing can constrain that freedom.
Also, note that the example is malformed: in almost all these cases, Meta et. al. aren't "stealing" anything anyway. They're downloading and reading stuff on the internet that is available for free. If you or I can't be prosecuted for reading a preprint from arXiv.org or whatever, it's a very hard case to make that an AI can.
Again, copyright isn't the tool here. We need better laws.