It works like this but I still don't understand why people trust a company that has the resources to buy a Superbowl ad. If they can afford that ad they must ch

It works like this but I still don't understand why people trust a company that has the resources to buy a Superbowl ad. If they can afford that ad they must charge their customers more than needed. In other words, the product is more expensive than necessary and the brand isn't offering the best possible value. The brand is signalling that they have convinced many people, or otherwise, they couldn't afford that ad. So I can trust in the choice of those people. But why should I trust the brand itself?