The clear advantage is that they will be a lot better at logic and already have some experience. I know a person who learned C++ at the age of 10(!). He still is very young, but very good at it. Today, programming is needed for more and more jobs. Chemistry, Physics, Biology, Design, Art, BA, ... because with programming, lots of things can be automated and simulated and people can become a lot more efficient.
I do not think that we should start out teaching kids Rust or JavaScript, however I believe that there are and should be toys which help them get started. For example something like a puzzle, building blocks which have certain functionality and the kids have to place them in a certain order. They might be able to program the way a toy car moves that way, and it is fun, and they don't have to be able to read or write or use a computer in general.