That is very subjective. For example, Lisp has a very simple grammar, yet many people find the minimalism complicated in how it manifests in paren heavy code. Likewise, Haskell's reliance on abstract mathematics is definitely going to turn many people off to it. "It's just math" is often taken as a negative, not a positive (depending on the person).

Natural language is built around all sorts of non mathematical ad hoc concepts, yet we seem to use it just fine. Of course, it might not be the best way to talk to the computer, but it is definitely "accessible."