Let's see...
> pip3: command not found
Okay. I'll need to install it? What package might that be in, hmm. Moving on, I already know it's python.
> /usr not writeable
Guess I'll use sudo...
= = =
Obviously I know better than to do this, but very few people would. This is not 'dead simple'! It's only simple for Python programmers who are already familiar with the ecosystem.
Now, fortunately the actual documentation does say to use venv. That's still not 'dead simple'; you still need to understand the commands involved. There's definitely space for a prepackaged binary.