So is advanced math, but a lot of people just don't get it, in spite of good education from an early age. ALL mental characteristics have a genetic component. Why would faith in a higher power be any different?
Perhaps a strict Calvinist would buy that; I do not. The proposed theory undermines the concept of free will - a basic premise present throughout the Bible. God gives us the will to choose: good or bad - right or wrong - to reject Christ or to embrace him. One cannot blame God for one's unbelief; this would be the logical corollary of the theory.