I agree with you, but the difference between being able to tell someone "if you need to install some dependencies in Rust, just use Cargo" and show them the doc

I agree with you, but the difference between being able to tell someone "if you need to install some dependencies in Rust, just use Cargo" and show them the documentation, and whatever the equivalent documentation is in Python are worlds apart. I think the author's argument would be weaker if he focused on a language other than Python that doesn't have a hellscape of a package ecosystem. And I remember custom build scripts with Cargo being a major pain at the time I used it, but the Cargo developers were able to sidestep major fundamental problems because they knew what didn't work with packaging in the decades before and managed to think about the design carefully enough from the start. Rust is different because the choice of package manager is "simply" Cargo, not necessarily that Cargo itself is trivial to use.