If you drop prices by 20% and your sales increase by 10%, are you increasing profits? Perhaps in your world, but not in the one the rest of us live in.
If you increase your sales by 10% and keep the same profit margin, you will increase profit. Hello?
That is why similar products have similar prices today. Without this axiom, there would wild fluctuations in similar products... which there aren't.
You don't find widgets for $50 right next to similar widgets for $3.