It's literally not, Rust tutorials are littered with `.unwrap()` calls. It might be Rust 102, but the first impression given is that the language is surprisingly happy with it.
If you haven't read the Rust Book at least, which is effectively Rust 101, you should not be writing Rust professionally. It has a chapter explaining all of this.
I didn't read anything in that section about unwrap/expect that it shouldn't be used in production code. If anything I read it as perfectly acceptable.