> No, there would just be less 4080s for people to buy.
Sure, and more 4090s at a lower price.
Sure, and more 4090s at a lower price.
They're cutting down 4090s into 4080s to fulfill a demand for a cheaper chip, while still supplying their premium option. Your fanciful world concept of things being sold for no/minimum margins is just that: fanciful.