I didn't miss the point, because the point only applies if you're itemizing in the first place and, as pratheekrebala mentions, we're talking about the vast maj

I didn't miss the point, because the point only applies if you're itemizing in the first place and, as pratheekrebala mentions, we're talking about the vast majority of folks who don't. And, in any case, the question isn't, "Will the IRS ever make a mistake?" Obviously they will. The question is, "Will the IRS make fewer mistakes than the mass of folks who don't itemize and who have simple tax situations?" I think that's clearly true.