You say that as if fairness has anything to do with it. It doesn’t. Programming languages need to let people install packages on all the major platforms. End of story. Any approach that doesn’t make that practical and scalable is dead in the water regardless of fairness. Even just on Linuxes, there’s enough package manager variation to kill that idea for installing language-level packages with all the different system-level package managers. If you want to lobby all the Linux distros and Apple and Microsoft to adopt a common package installation standard, that would be great but until that happens, that’s just not a feasible way for languages to install packages.