On the flipside, the usual argument around "simplicity" and "readability" is just code for "familiarity". A Haskeller used to composing a bunch of folds has no obligation to transform their program into something readable by Python programmer, unless of course, they were the only Haskeller.

But I agree, there's a difference between code that veers towards obfuscation and code that employs techniques someone just hasn't learned yet.