Because they are selling unintentionally defective products, that they replace when it is brought to their attention. That's what a warranty is for.
If you feel you're being ripped off by a company, you don't try to screw them back, you just don't do business with them.
The OP sounds like he is going to do the right thing, but the people who suggest "screw Apple" are just dishonest and are in violation of MacRumors policy against suggesting illegal activities. (Fraud.)
I am a woman