Hover time aloft vs. flying time aloft. Why is hover time shorter?

[EyesWideShut]

I think forward flight at 32kph in no wind conditions vs flying at 32kph against a 32kph steady breeze would be the same and for both you'd have to give it the same forward thrust to equal 32kph. You'd save with the extra lift generated by the additional air flow. Both would use the same amount of battery if all you were using just the forward stick and no throttle, yaw or roll.
Now if you have the drone stationary, hovering against the 32kph breeze and not in ATTI Mode, it will be constantly trying to maintain its exact GPS/Ground position and adjusting the speed of all 4 motors to hold the hover stationary. It'll be like driving a car and inefficiently adjusting the speed, on and off the gas wasting power.

 

[mobilehomer]

If it's bouncing then it's not a steady breeze.

In the real world, there is no steady breeze!! Even inside, like a living room, it will move around and bounce a little.