I'm pretty sure they would prefer to have a diversified line of products with customers willing to buy them. Should apple just stop selling everything except their most expensive iPhone, because it's expensive and popular?

Would that not perhaps hurt their product ecosystem? What if people decide they don't want so much of one product, and would actually like to buy some of those cancelled products at some point in the future? I guess they'd have to go to a different company then!

Who said anything about individual GPUs or consumers?