That’s how I feel about all of this Javascript stuff after coming from Rails. You mean I have to do [insert basically anything] all on my own, from scratch? But Rails gave me all of that out of the box!
It's not even about the standard lib as much as the culture. Ignoring the fact that it would take years for the changes to become widespread enough to be usable, "pull in 400MB of dependencies for everything, including dependencies of dependencies" is practically a cultural value in the JS scene. It demonstrates why JS is voluntarily practiced primarily by the inexperienced all these years after it established itself as the universal platform.