To the extend that Python is indeed "batteries included," that seems true. But just how "batteries included" is it? I'd argue that its batteries are pretty limited. Exhibit A: everybody uses the third-party requests instead of the stdlib urllib. Exhibit B: http.server isn't a production-ready webserver, so people use Flask or something beefier.

I'd contrast Python with Go, which has an amazing stdlib for the domains that Go targets. This last part is key--Go has a more focused scope than Python, and that makes it easier for its stdlib to succeed.