Exactly.
Just as is the case with Nissan, where I work: Johnson Controls is the company which produces our seats. They already have tooling set up, and it's cheaper for us to buy their product that put forth R&D and setup costs into getting a dedicated "seat line" installed in the plant. But when you buy an altima, you buy "seats and all" with our name embroidered on EVERYTHING.
Sucks, but JCI gets their dime so it's all good.