He's referring to the fact that Rust programmers try very hard to avoid using `unsafe` blocks. Which is a good thing, but he's trying to make it sound like it's just people being snooty or something.

A better way to put it would be "how does the frequent need to use unsafe code in embedded square with Rust programmers' general desire to avoid unsafe code?"

But then it's a boring question and the answer is obvious - they still try to avoid it.