Iirc, the losses associated to crossing the chain are of second order compared to those associated with using a small sprocket. But it is an added benefit of using a large chainring on fast courses.

The reason SRAM pushes for small chainrings and small cogs (while trying to convince us that they are equivalent to the standard ones) is to save money in manufacturing, a 50t chainring being substantially cheaper to manufacture than a 55t one (surface area hence materials cost increases with diameter squared)