[fluffything]

And even for the user that only uses high level web frameworks, the moment that user needs to debug its program (which might have a bug in its executor), it needs to understand pinning.

I don't see any use case in which understanding pinning is not necessary.

[withoutboats]

There's miles between understanding pinning well enough to call `Box::pin` (a safe API) and understanding pinning well enough to call `Pin::get_mut_unchecked` (an unsafe API). When we talk about understanding pinning, we mean the latter.