When you use many languages, don't you become a jack of all trades, master of none? Also it's not obvious python is good for scripting, bash is better at short scripts, statically typed languages are better at long scripts, and you can't use it in CI yaml scripts. Python is more famous for data science and AI, not for scripting.
I used "scripting" loosely (Python source files are frequently called Python scripts), I wasn't referring to shell scripts specifically. Feel free to pretend I said Bash or data science or whatever you want.
Re: your first sentence: I neither understand the logic nor do I understand how insulting the developer is going to help D succeed here even if the logic was sound.