Anyone who thinks pilots can arrange their sleep schedules is clueless about pilot schedules. Often days ahead you are flying another trip. I only flew long haul for a few years and am really glad I don't have to do it any more. Short haul can be just as bad though. I flew night freight for a while and my duty day was usually 7pm to 7am flying three legs for five days in a row plus positioning flights at the start and finish. That was worse. Come to think of it I am really glad I don't have to fly at all any more. Thirty four years was enough.