So your experience is napping all flight to save yourself for your brief burst of action on turnarounds. Easy to do 40 hour duties if you can sleep most of your long '8 hour' sectors! I used to fly up to 14 1/2 hour legs, (with a relief crew), and 11 hour time changes to be handled as well. Any real pilot knows you cannot sleep to order.
I'm still speechless at being called 'irresponsible' by a non-pilot doing a vastly different job with frankly not a great deal of parallel (but not quite). It's remarks like yours (from a person who has no concept and does something quite different anyway) that put me off this place for years.