I think his point is sound. His arguments are in line with the ones from Kathy Sierra's book Badass: focus on making your user awesome, instead of telling them

I think his point is sound. His arguments are in line with the ones from Kathy Sierra's book Badass: focus on making your user awesome, instead of telling them how awesome your app is. Or in Rust's case, tell users how great they will be at systems programming when they pick up Rust, instead of technical details like "memory safety without garbage collection."