I wouldn't say this is a wart or confusing (to me at least). As someone who uses Haskell, C++, and Rust regularly, I just accept that each language has its own syntax. It's true that Rust borrows ideas from many languages, but I view Rust's syntax as its own thing, and the meaning of the symbols are what they are. It doesn't have to do things the C++ way or the Haskell way. It does things the Rust way, and that's not a wart.