It probably depends on what you do with embedded, I can certainly imagine situations/jobs where you are correct, but I am not in that situation, unfortunately. I can't afford the time to write my own drivers unless I really need/want to.

I run an electronics workshop at an artschool, so the end result counts and how we get there is more or less arbitrary unless it happens in a finite timeframe. For my own private projects I tried Rust, but also there my goal is to get things done, not to fool around forever. I like fooling around with the interesting bits, not with rewriting a thing others have written before.