All modern editors do that pretty well with language servers now. Specifically, Emacs and Zed do this perfectly with Rust.

I do think it’s down to personal preference. With the fully qualified names, I can look at the screen and follow the flow without having to mouse over the various names in play. For that matter, I could print it out if I wanted to and still have all the information.

I don’t think you’re objectively wrong. It’s more that we have different approaches to managing the complexity when it gets hairy.