Lack of courage. I really have no incentive to play Go competently except or the fear of being mocked for not playing this game that my peers venerate as being the domain of deep thinkers with fully functioning right brains.
So if I lose the fear, I'm good. It's then irrelevant whether I ever become competent, except possibly that my playing at a certain level of skill would make it interesting for my friends to play me.
But otherwise, it's just the fear that concerns me.