However allowing the FO (who is almost certainly less experienced) to fly the approach frees up the Captain to monitor the approach and is probably a safer option
I cannot see the logic behind that statement. If it is OK for the F/O to fly the approach even if he is certainly less experienced, then presumably it takes little skill. Then why are captains who fly the approach flying into the ground? Surely monitoring the approach takes no great skill either - after all the captain is not directing the F/O what to do like turn left here, slow down here, speed up here, lower the flaps now. All the captain does is watch and shut up.