Idris and Rust are ML descendants and C helps you to learn the basics of low-level programming. Lisp on the other hand won't teach you anything. How hard is this to understand?
> Secondly: The first paper on S-Expressions appeared in November, 1997.
That was just a draft of an RFC which never got approved. S-Expressions are MUCH older - it's "Polish Notation" invented by Jan Łukasiewicz in 1924
> McCarthy's first paper on what would become Lisp in 1982.
Lisp was specified in 1958.
> I'm aware of no language, and can find reference to no language, that used that notation before Lisp did, so yes it is original to Lisp.
1. It's not about who used that notation but who invented it - not McCarthy; 2. that notation is practically useless for programming languages but they're good for ASTs.