What they are not doing, as far as I can tell, at least not intentionally, is just copying code and removing the license and attribution. Even if you don't see the AI output as legitimately "creative", it's certainly transforming and remixing existing solutions in ways that are transformative enough not to be just copies of anything except the most bog standard boilerplate, which is usually not a copyright issue.
People seem upset because there is money to be made, if there was no money involved I don't think anyone would see any issue here.
It's not about the greater good, and I don't mean to be an apologist, but I just legitimately don't see a problem with doing it, or how it's not fair use. It really does seem like fair use to me.
That's a long way of saying, for what open source is and was, a lot of projects are mislicensed when juxtaposed to their goals and needs. It's okay to sell your software, it's okay to be "source available", it's okay to be entirely proprietary.
These aren’t official (& hosted on a different, proprietary data siphoner), but there are attempts to add anti-AI clauses.
And the CC0 license seems extremely contradictory with this added clause. I would definitely stay away from all of these licenses.