I checked the readme of both those packages and I can't for the life of me understand why would anyone use either of them.
Why the fuck do all these leftpad is-even hello-world tic-tac-toe packages have millions of downloads?
Command line argument parsing and config loading both seem like very sensible library abstractions to me. This isn’t leftpad.
Command line argument parsing and config loading both seem like something that the standard library should provide.
Ok, now, what languages beside Python and Go provide Command line argument parsing? And Go doesn't do that in a `professional` way. You either write your own, which can easily turn into a clusterfuck or use a third party library. Even in Go, people use cobra[1]. Also embedding a lot of functionality in a standard library isn't great as well, because if some vulnerability is found, it's really hard to patch it, because you need to push versions and (for example on Linux) some distro maintainers won't push it for `stability` etc. A standard library should provide basic functionality (in most general areas), but not very advanced one.