I presume pax still get fed and watered on long haul flights. They have to remove masks to eat and drink. It therefore seems futile to be wearing a mask the rest of the time. No problem with wearing a mask at the airport / at the gate / during the boarding process. Likewise during the arrival process. No problem with wearing a mask on the aircraft whilst moving around the cabin (as in going to and from the washroom). But wearing a mask in one's seat for 6 to11 odd hours is just OTT.