Needing a helper library for something as simple as async so you don't go mental is really not good enough. I see the same thing with error handling - every Rust project I see imports a helper because it's too clunky otherwise.
Rust is not a batteries-included language like Python. There are lots of libraries that are very commonly used in most projects (serde, thiserror, and itertools are in almost all of mine), but this is a conscious choice. They say in Python that the stdlib is where projects go to die. I'd rather have the flexiblity of choosing my dependencies, even for stuff I have to use in every project.
So you are stuck with smaller, less battle tested products if you'd rather not pull in 100+ crates of dependencies that are doing nothing but inflating the build times and file sizes (for your particular usecase).
Example: reqwest vs ureq
Increased build times are not great but holy shit the way people talk you'd never know that that's the actual trade-off here, an extra 3 seconds on a clean build.