aye but imagine if it took a year to get there, you wouldn't notice the time difference thenImagine teleportation exists, you still get jet lag, but you can sleep in your own bed the night before to help mitigate it. So I don’t see the difference here between in your own bed or on the plane.
Personally I tend to land then stay up and go to bed first night super tired and if I get like 10hrs sleep then I’m fine the rest of the trip.