What's dirty is trying to get a python project reliably running on all dev computers. Pyenv, venv, wheels, suddenly you need a complete rust or c toolchain etc. With java I haven't had those kind of issues the last decade, it just works. With python it's still a big hassle and everything breaks every update.
To be fair, getting all those scientific library binaries compiled and installed was a huge pain even before python came around. Python's toolchain made it better, but only marginally in some cases.
