This is an irrelevant comment. The topic of the conversation taking place is the revenue distribution of dealerships, not the relative reliability of different car manufacturers.
Regardless of manufacturer among well-known cars in the U.S., the economics of a car dealership do not change from one to the next.
They have a long history of this, even when the "American" car is the same as the Asian car except for the name plate. The big brands often fill gaps in their lineup with a car from a smaller Asian company. Other than the name it is the same car built on the same assembly line. There cannot be a difference, yet Consumer reports will rate the American car lower.
Regardless of manufacturer among well-known cars in the U.S., the economics of a car dealership do not change from one to the next.