I think what you're saying here is that by "it's not possible" you meant "it's not possible to hold companies liable for their chat-bots' words and still have those companies producing chat-bots." I agree. I think that would be the correct outcome.

There would be some very narrow spaces where LLMs would be usable, but mostly they would cease to pollute everything. Unrelated to AI, I'd like to see lots of regulation that blocks externalizing costs. For example, maybe it's also "impossible" for Walmart to operate in the US if they don't have all their employees getting state assistance. That would also be good. Maybe it's "impossible" to have a beef industry without massive pollution and deforestation. Also good. Et cetera.