It is an issue for Python, though this specific issue isn't the main issue for Python.

More generally, it's even harder to routinely call programs while connecting them with pipes and ensuring that the programs run in parallel. It's a pain to routinely call other programs and get results Python. It takes many many lines of Python to do tasks that are clearer one-liners in shell... and vice versa.

Python and shell are different; each are good at different things.