You can always use the system python to create a venv. It's ubiquitous in the sense that you don't need root access to use properly, not that it comes set-up and ready to use for all purposes.

You can just use rye and retain your sanity like everyone else.

As I said, a lot of the value I see in python is in its ubiquity. I don't understand why I need to keep repeating this.

Hopefully no complaints when you break something in system python and your system has a negative reaction to that breakage.

I don't understand this comment.

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.