That is great, and as someone just starting to dabble with Rust I'd love a resource like that.
But: no matter how well-curated your site is, and no matter how quality those libraries are, and how well maintained, "batteries-included, in the stdlib, backed by a compatibility promise that the dev team is willing to uphold" carries some serious weight.
It does, but it's not without its downsides either. stdlib modules might end up being abandoned or deprecated because the design can't be changed and it doesn't work well anymore or there are unfixable security issues. Python's stdlib has plenty of such modules for example.
Considering that the Rust dev team is mostly volunteers, and many of the most important non-std-lib libraries in the Rust ecosystem are maintained by those same people I feel like there's less of a distinction than there is made out to be.
But: no matter how well-curated your site is, and no matter how quality those libraries are, and how well maintained, "batteries-included, in the stdlib, backed by a compatibility promise that the dev team is willing to uphold" carries some serious weight.