Why doesn't Python come pre-built with required libraries like pandas, numpy etc
PyPi currently has over 100,000 libraries available. I'm sure someone thinks each of these is important.
Why do you need or want to pre-load libraries, considering how easy a pip install is especially in a virtual environment?
What is the reason packages are distributed separately?

Why do we have separate 'add-on' packages like pandas, numpy?
Since these modules seem so important, why are these not part of Python itself?

Are the "single distributions" of Python to come pre-loaded?

If it's part of design to keep the 'core' separate from additional functionality, still in that case it should at least come 'pre-imported' as soon as you start Python.

Where can I find such distributions if they exist?