Some of that is avoidable schism. But some of it is a natural consequence of Python by itself not being quite sufficient to solve the real-world problems people

Some of that is avoidable schism. But some of it is a natural consequence of Python by itself not being quite sufficient to solve the real-world problems people are throwing at it - in particular stuff like Conda is very useful for numeric Python since it ultimately abstracts away a lot of C/Perl/etc. which downstream Python packages depend on, but which pip and venv/etc by themselves aren't designed to handle.