That's pretty much the reason why. Raymond Hettinger explains the philosophy well while discussing the `random` standard library module: https://www.youtube.com/watch?v=Uwuv05aZ6ug

I feel like much of this has been forgotten of late, though. From what I've seen, i's really quite hard to get anything added to the standard library unless you're a core dev who's sufficiently well liked among other core devs, in which case you can pretty much just do it. Everyone else will (understandably) be put through a PhD thesis defense, then asked to try the idea out as a PyPI package first (and somehow also popularize the package), and then if it somehow catches on that way, get declined anyway because it's easy for everyone to just get it from PyPI (see e.g. Requests).

I personally was directed to PyPI once when I was proposing new methods for the builtin `str`. Where the entire point was not to have to import or instantiate anything.