https://docs.python.org/3/library/
They don’t make third party libraries obsolete— for example, I tried using the built-in IMAP library the other day and it’s definitely too low-level to make sense for most quick projects that check email, so I used a third party Library— but all of those modules are vetted, stable, and require no external dependencies.
I believe the node maintainers have staunchly opposed such measures. I don’t know what their reasoning is so I don’t have an opinion on whether or not it’s worth it.