Why isn't packaging part of Python core development? (pydevtools.com)

""" Basically, they’re separate because Guido doesn’t care about packaging. That’s really what it comes down to. When packaging started to become a thing, we just didn’t have any interest in it, and so it never became a core dev concern. It just never came up—it was just not our thing. """

That's the way that junior programmers think. Marketers too.