Isn't the fact that bash doesn't have a wonderful ecosystem of reusable modules a much more enormous insurmountable problem than the fact that you have to install python modules? You're really missing the forest for the trees.

Not only does bash not have a module system like python, or a vast ecosystem of modules like python, but also that it's much too weak and brittle a language to implement most of those modules that Python has, and can't even call native code libraries directly.

Even with just its standard built in "batteries included" libraries and no extension modules or native code modules, Python is still much more powerful than bash and easier to code and maintain.

If you're complaining about having to install Python modules, you're usually already doing something that's impossible or incredibly difficult to do in bash anyway.

Even something as simple and essential as fetching files via http or parsing json. Bash has to call out to other programs to do that, but you have to install those programs too, and while Python can certainly call out to curl or wget or jq, it doesn't have to, since it has all that and more built in.

There really is no comparison, because bash loses along so many dimensions at once compared to Python.