There's the risk of breaking the system when using system python. Install some dependency for your script that changes something that a core service is depending on in an unexpected way can lead to hours of tracking down the issue. Or a full reinstall in the extreme. That's why users are to avoid using system python.
But if you value that ubiquity more than your sanity, I hope you find and fix any breakage yourself and not pester other devs for support.
But if you value that ubiquity more than your sanity, I hope you find and fix any breakage yourself and not pester other devs for support.