Of course, all of us hear that argument from time to time, and i guess is (mainly) for the reason you mention...
What is curious is that, when i play checkers with those people, i win almost the times, although i lose fair and square to those people who really know how to play checkers (some 10 % of the total).
My conclusion is that people who say that phrase don´t know what chess is and don´t know either what checkers is...
I've been playing chess since the age of 8. Throughout my years playing, I have heard, and still do hear the line, "Chess is too hard to learn" from a great number of outsiders to the game. I couldn't help but wonder what drove this same response time and time again...
My conclusion: Chess is being compared with that of checkers!
Have you heard this line, or something relatively close to it? If so, what is your conclusion?