They’re already defeating the point of Python packaging in multifarious ways here. The entire reason uv and uv-build exist is because we have mature, smooth mechanisms for not rebuilding the world.
Speaking as someone who has written many Python packaging PEPs and who has maintained (and continues to maintain) PyPA tooling that you almost certainly use: uv and uv-build are as much a part of Python packaging as anything else that interfaces with the standards.