Agreed, but it doesn't take more than a couple of sentences to describe the entire syntax of the λ-calculus. It's not hard to pick it up even if you've never encountered it before.

Contrast that with JavaScript, where even as someone who has written my fair share of it, my eyes tend to glaze over when they hit a string of `});}))());};`. Yet people happily write that sort of thing, then turn around and complain about nested parentheses in Lisp!