Remainer Tories being pragmatists who don't want to blow up the economy is precisely why a referendum is a distinct possibility: it's a feasible way to avoid no deal. No deal would be a catastrophe that has a severe risk of making them unelectable for generations.

To a first approximation, Remainers, left or right, are pragmatists and will be satisfied by salvaging the best of a bad situation and avoiding the really terrible outcomes, while Leavers, left or right, are ideologically committed to their positions, who want to implement their policies even though it carries significant risks - of course exceptions exist in every quadrant, but as a first-order model this is a good one.