I think one of the issues (beyond media's propensity towards sensationalism to draw attention) is that the extremes at either end of a debate are very black and

I think one of the issues (beyond media's propensity towards sensationalism to draw attention) is that the extremes at either end of a debate are very black and white. Black and white can be explained in a single sentence many times but everything in between is nuanced (or grey as you called it). The problem with nuanced positions is it requires more than a 280 character payload to explain...