I suspect it's designed that way intentionally.

It's a language built to make it hard for new joiners to mindlessly add complexity, as the language itself will fight you. It makes it hard to add dependencies that aren't very visible and vendored in, it makes it hard to change how the language behaves with overloading, preprocessor magic or macros, and so on.

It's built to fit Google specifically, with their army of new grads, and deep investment into reinventing all the dependencies themselves, and having a huge monorepo.

If you're not google, you're gonna have a bad time, which is also good for google.