Comparing to Linux is too general. You need to say what distro and what install level. I really only use headless Linux, but I've never logged into a fresh install and not had to do some sort of 'apt install devel-packages' equivalent for which ever distro being used. That's the same thing with macOS after choosing which package manager to use. I don't see how Linux vs macOS is very different

> What exactly is missing from macOS that makes you feel the need for Linux?

For starters, the source code.