> the overall energy and water usage of AI contributed to by the actual individual use of AI to, for instance, generate a PR, is completely negligible on the scale of tech products.

10 GPT prompts take the same energy as a wifi router operating for 30 minutes.

If Gentoo were so concerned for the environment, they would have more mileage forbidding PRs from people who took a 10 hour flight. These flights, per person, emit as much carbon as a million prompts.