to be honest. ill never use uv. python ecosystem tools should be in python.
I feel like having a working python environment is not a great requirement to managing your python environment.
Also, i tend to run pip like 4-5 times max (except initial package installations) during whole project lifetime, or not at all if packages are in distro already. Its speed is ok for that. So I'm not sure what "should" i miss.
most of the stuff in the python ecosystem have a core built in C, including the language itself.