Its awful package management makes using Python for CLI applications more painful than it has a right to be. Despite this egregious shortcoming, it's popular for scripts only because it comes with a quite extensive standard library.

These days I'd rather suffer through the verbosity of Go or strict memory semantics of Rust (which are no concern in most CLI applications) than write more than a dozen lines of Python. Personally, while I think the compiled world has settled onto a few very good languages, the scripting ecosystem still to this day leaves a lot to be desired.

Won't work on windows outside of WSL, at least that has been a reason I've heard for not using Bash for simple stuff.

For complex applications bash (or shellscript in general) is also rather ill-suited as it has a lot of footguns and can be hard to maintain.

I have no idea if Bash has library? It's more like for managing host stuff rather than compute wide range of application.