Sales: assume the product sucks and your job is to convince customers to buy a really shitty product
Product: assume that there is no sales and your job is to create a product that people cannot stop raving about after using it for few minutes
Client Services: assume the product sucks and your job is to still keep the customer satisfied
Edit: To clarify: Red Bull is, for me, THE epitome of marketing. They sell a tremendously unhealthy product (bacon-smell car) as something that is healthy, basically by connecting themselves with extreme sports. Red Bull IS extreme sports and lifestyle. How insane if you think about it.
I agree with you though.
It's pretty easy to attack a product with the argument that "you won't need" it. There are only a handful of things that humans truly need.