I think it'll get harder and harder to find 'pure' distros. For a while you can maybe rely on something similar to Gnu linux-libre kernel that removes proprietary blobs, or BSD, or Gnu Hurd kernels etc, but linux-libre is already a pain if you need certain hw drivers, and eventually an anti-ai kernel will become crippled even worse, and it will become too hard to keep track of what kernels/parts of kernels is AI assisted code or not.
In the future, more and more new features will be from ai assisted code, and pretty soon, the anti-ai kernel will lose out to ai-assisted kernels in features, speed and soon stability (bug-finding etc).
The same goes for the rest of the distros that tries to avoid ai-assisted tools and code, and you/others will imho get completely swamped by this transformation. In fact, you will most certainly need an agent to keep constant track of this development.
I'm okay with AI, but I kind of feel for those trying to avoid it. Its hard enough just to avoid proprietary crap, and to me, avoiding ai-assists, is an even bigger mountain to climb. I do wish you all best of luck on that journey.
Ps. There ARE fully open models trained on fully libre with open libre data-sets, and for you - ethical data oriented - you could/should? probably accept that 'non-pure' situation, and use such an open llm to either maintain an ethical distro, or keep unethical ai-assist as low as you can get away with, for as long as you can.