How on earth do you write your own `Future` type without understanding pinning ? Or your own combinator? Or executor ? Or how do you understand the error messages when trying to Box or Rc a future? Or write an `async` abstraction over some C FFI component that you need to use? Or...

If the goal was for users to just use high-level web frameworks, and when there is something that the framework cannot do (which is currently a lot), the expectation is that users should just shrug their shoulders and tell their bosses "Sorry boss, Rust can't do that", then sure, there is no need to understand pinning. But such users do not need to use Rust either, an pretty much any other programming language like Go or Python would have been a much better fit for them.