I get the aerodynamics.
However, I'm not so sure it's worth the trade-off with brake cooling. I would rather have cool brakes on a twisty mountain road than save 1~2 mpg on the freeway because my wheels were more aero.
On bicycles, the brakes are outside the disc of the wheel. Same for motorcycles. But cars rely on good flow from the wheel-well out through the wheel vents, to cool the brakes.
At high velocities, like autobahn or interstate driving, the high speed flow across the outside of the wheel is going to provide a pretty good suction to draw air from the wheel-well out through the wheel vents. But cruising along at 80+ mph is a situation where the brakes are not going to be very hot, so if you need to hit them hard, they are ready. So the cooling provided at high speed is not really as needed.
When you usually need good ventilation is in a situation like a twisty mountain road, where you're constantly on and off the brakes, up and down hills, etc. But in this situation, your overall speed is much less, so the aerodynamic suction is going to be less, thus the flow of air over the brakes is going to be less. So you'd want bigger vents.
Granted I obiviously didn't go through the design optimization process of these wheels, so I don't know for what speed they were optimized.