My thoughts exactly. It surprises me that Bernardo so emphatically embraces such an arbitrary conclusion.
I suppose the best refutation of Dualism, is that it is inconsistent - you have two realms that are meant to be distinct, and yet which must obviously interact! As for Panpsychism - there doesn't seem to be much evidence in its favour. Also, if you take it down to the level of fundamental particles, it seems to be in contradiction with QM.
However, my feeling is that science is absolutely built on theories that are strictly speaking obviously false. Take Ohm's law. If you push the voltage on a resistor too high, the thing will burn, but even at smaller voltages, it will heat up, which will in turn change its resistance! Ohm's law is useful because in many practical situations, those problems can be neglected. Taking Dualism as a real theory in the same sense would be a decent step forward because it would be far more testable than Idealism. In a very real sense many ψ experiments can be seen as tests of Dualism - thus for example, ESP can be seen as an interaction in the mental realm that is not mediated by physical processes.