Man, I want to like J and K but the constant vibe of "this language is so dense and complex, only a few genius programmers will ever understand it" is getting old.
You shouldn't feel intimidated by their density. Both J and K are extremely approachable languages, but you need to try them an open mind and act as if you didn't know a thing about good coding practices. With time you will realize that only a tiny fraction of those apply to the APL language family.
As a k programmer myself I'd say to take that statement with a grain of salt and at least give the language a chance if you have some spare time. It's certainly true that the community is small and it's certainly true that there are plenty of really sharp programmers in the community but that doesn't mean that you need to be a genius to write k code.