I still don't understand why in 2021 `pip`, which is the standard package and dependencies manager in Python, cannot 1) build a package from some spec 2) genera

I still don't understand why in 2021 `pip`, which is the standard package and dependencies manager in Python, cannot 1) build a package from some spec 2) generate the scaffolding needed to build such package `gem` from Ruby does that (well, it doesn't 2 AFAIK but at least it does 1)