What basic concepts (beyond installing and managing Python env) would you learn by using an interpreter installed locally?

The point, to me at least, seems to be laying the groundwork for even more learning and experimentation in python, while making it as easy as possible to do so.

It also has the benefit that any reader will end up with the same expected environment the guide is written for.

I will say that I totally agree that calling it the "right way" is disingenuous at best, and pure marketing fluff at worst.