I don’t think you ever took even economics 101 in school because for almost all products there exists a price where you can actually increase your profits by decreasing the price because the larger sales volume offsets the revenue lost. Applies to your fridge example as well. You just assumed the same sales in both scenarios which is not even close to being realistic. And your Nvidia/AMD example ignores the high inflation seen during that period.
I did that knot in front of a shoe saleswoman and she commented she had never seen anyone do that before. Asked me to show her again how I did it.