I would probably place rust in-between python and node. It is made worse by the relative in-maturity of the ecosystem which contributes to the fragmentation. Rust will likley improve, but I have little faith for Node, as it's cultural as you mention.
Case in point; here is a list of most used crates. Some of these contain a single macro or wrapper. https://lib.rs/std
Any Rust project has endless crates scrolling up the screen.
It has exactly the same culture as npm, which is no wonder, because many folks adopting Rust come from Web background, not C and C++.
Also if it wasn't a problem, articles like this wouldn't exist,
https://tweedegolf.nl/en/blog/104/dealing-with-dependencies-...
(This doesn’t mean Rust doesn’t have a dependency proliferation issue, only that the way you’re substantiating it is misleading: it’s like saying that C has a dependency proliferation issue because libfoo goes from having 3 source files to 5 source files between releases.)