Your subjective perception is not reality. You have to think about it, or your programs will be incorrect. The mental load may be low to an experience Rust programmer, but it is there, and it's very intrusive to Rust beginners like myself.
> If you don't believe me, you're welcome to watch the literally hundreds of hours of me live coding in Rust on YouTube.
That's not relevant. Lack of external indicators of cognitive load does not mean that it's not happening.