As much as I'm put away by the dependency horror I've seen in many Rust projects, this is an interesting observation.
For example, std's linked list seems rarely useful for anything but scripting, and could've easily been a crate. I don't think it's egregious or anything, it's just a bit meh. I don't really use Rust for scripting though (I usually use zsh or TypeScript), so maybe it's super valuable in specific cases.