The fact that, from the advertisers' perspective, you may be a defective product, doesn't mean you aren't part of the product package they're paying for when they buy an opportunity for the eyes and attention of those watching the shows. They're buying a stack of lottery tickets - yours just doesn't have any big win for them. But if you watch the ads, they probably *have* influenced you at some point, even if only to make you aware of a product's existence that you might not have known about otherwise, so you're still a bigger win than viewers who always mute commercials or leave the room or otherwise remove the commercials from their perception entirely. BUT - they have statistics on those things, and consideration of their habits, and your apparent general unresponsiveness to subliminal ads or Freudian tricks, is factored into the price they pay for the commercial time.
The is to make people remember the product in a durable manner, so that they won't forget it when it's time to make a purchase.