I was half-thinking the same, but types and sets feel interchangeable on an intuitive level in such cases.
Having both `: String` and `: String` seems to suggest that they are the same type, which they are not. `nameMe(_)` is a function type, while `name` is a "plain value", so to speak. I think that using arrows more clearly indicates that it's a mapping from something to something else -- in the case of Swift, I guess a mapping from a tuple to something else.
And think about anonymous functions, in general since I haven't looked into Swift anonymous functions. If you indicate a function like this:
`func nameMe(name: String) : String`
How are you supposed to indicate an anonymous function? Like this:
`(name: String) : String`
Then it seems to say that name is a type of String, which in turn is a type of String. I guess you could add something like a lambda to distinguish it:
`(λ name => name): String`
But now you've still effectively said that both `name` (a value of type string) is the same type as the anonymous function (a function with one argument). That's clearly wrong.
Using arrows for functions seems to be better when you start to want to talk about types and values by themselves, like:
`1: Int`, `"hello": String`, `(λx => x) : a -> a`