As someone with lots of Rust experience I agree with the author. Rust has more concepts that users need to learn. It's not gratuitous/accidental complexity. Each of these features is IMHO pretty well designed and useful, but nevertheless Rust does have a larger toolbox.

It's not necessarily bad. Do you prefer to put more effort into your program before it compiles, or debug it after it's up an running? Do you want a static guarantee, or do you trust yourself to get it right? These are fair trade-offs.