I'm not sure how it's ignorant. I sort of prefer the C/C++ way of using/packaging libs. I wouldn't want it with higher level languages like C# or python, but a central repository isn't great in my opinion. Rust has people squatting on package names for no reason. Python packaging is so miserable there are a few different competing 3rd party package managers. NPM has had numerous security issues that have caused way more of a mess than anything C++ related. The C# package manager seems okay, but as far as I know will not package libraries as source code (I'm not sure about that one).

All the package managers I've used have pros and cons, including using none at all.