because you're a youngin. athough usually heineken is marketed as uppity yuppy beer, and isn't cheap. if you want to drink cheap beer, that's cool, everyone does. keystone, bud, coors, busch, natty, pabst, etc.
Heineken however has the taste of shitty beer with the price of a decent beer. Personally I think it tastes like a skunked, shitty beer.