The problem here is pigeon holing. When you are eager to classify people fast and efficiently into a small number of bins, you trample on a lot of nuance. For

The problem here is pigeon holing. When you are eager to classify people fast and efficiently into a small number of bins, you trample on a lot of nuance. For instance, suppose I thought abortion should be legal for the first N weeks, but require case-by-case approval from a panel of ethicists after N weeks. Does that put me in the pro-life bin or the pro-choice bin? Probably more the latter than the former, but it's certainly not a pure 'choice' position to have on the matter.