Why is this a contradiction. Modern heat pumps at least in Germany are using the normal water based radiators. It is true that they are more efficient if used w

Why is this a contradiction. Modern heat pumps at least in Germany are using the normal water based radiators. It is true that they are more efficient if used with floor or wall integrated radiators. But they are already more efficient looking at the current energy mix (and the current load) here by just exchanging your gas or oil based central heating with a heat pump.