Alright for some, many of us fly charter operations from Central Europe to The Canaries and back, with a planned FDP of 13:50 and a flight time of 11:50 (enough to get you from London to Hong Kong).
AND you do it at night, lose sleep, consecutive days, lose more sleep; try to sleep twice in 14 hrs during the day in a raucous unquiet hotel, but it's not considered the same as jet lag. Daft FTL's & rostering. Classic case of rules and spirit of the rules. Sadly common sense is not in large supply when consdiered versus costs/profits. They now even advocate 'inflight controlled rest', for long 2 actor days, in a pilot seat with not enough recline to be really comfortable, and some even without headrests. And then the C/A's call every 20mins and wake you up. Sounds great on paper but totally unrealistic. I used to fly heavy crew trips with a normal pax seat for rest with only a curtain for privacy. Knees in you back (front row) or full recline in front of you (rear cabin). Full cabin service going on, no sleep at all. Pure daft. It's all a paper exercise with no respect of what is at stake; especially when these trips right be during the last couple of days of a long block. The playing field has never been level, but it's a lot more bumpy and skew-wiff these days.