“That last 30%” is kind of a funny phrase. If you were saying “That last 5%” I would probably agree with your take. But 30% is a massive chunk of the profit of every company in that whole market.

30% isn’t “that last”; it’s a substantial chunk of the money generated by the product you’ve spent years making, and I have trouble mustering your apparent disdain for anybody that would by so gauche as to expend energy trying to recover it.