Not particularly true especially in this case. You can get a rust binary and run it anywhere regardless of libc or having cargo installed on the users machine. A Javascript CLI requires nodejs and npm to be installed before running it.
Same goes for Go BTW. I even find it easier to install Go (haven't done it for Rust that often yet) and compile a binary (of a "pure" project that doesn't involve C libraries or other complications) than installing node/npm/nvm/whatever to get something up and running...
For their main use case they do package it up for npm, but the crates folder have each portion available to build/distribute as a stand alone binary you can run against javascript without node or npm installed.
