That Rust and C use different data structure is not a thesis in the article, it is used as a fact in an explanation. To support this fact the author explain how

That Rust and C use different data structure is not a thesis in the article, it is used as a fact in an explanation. To support this fact the author explain how intrusive data structure are easier in C thanks to a lack of static ownership (for the same reason they are way harder in Rust). To demonstrate the claim that C and Rust have different idiomatic data structures you need to rewrite software from C to Rust and to Rust from C and see what is hard and what is less hard.