Do You ever Really Listen?

Have you ever had a problem, and you asked around for a solution?
Say, Someone “less-respected” gave an answer to your problem, but you doubt or won’t take it.
Sce: Your car tire was flat, your driver easily solve it for you. But you don’t trust him as he might exchange your tire with cheaper one or he might cheat your money.
Or, Someone “highly-respected” gave an answer to your problem, but the answer is too common-sense. Still you doubt it.
Sce: A doctor told you that you simple had common flu, but you insisted on a bigger-drama illness like H1N1. You doubt him, and get 2nd opinion just to prove you are right???

Why do we ignore “correct” or “common-sense” answer? Is it because it is too easy to solve? Do we reject it as we deny our inability to solve the simple problem?
Then why most people readily believe impossible advice or take magic cure? Why take the complicated way?
Sce: You asked car agent about the flat tire. Then you got an advice that you need to change the entire car. And you go crazy about getting new car.
Sce: Your doctor said you had common flu, lots of water, take meds & a good rest will do. Still you go to “magic doctor” for 2nd opinion. He said someone sending evil vibes to you, then suggests you to take flower-bath, burn a few incenses, and donate to magic God. Suddenly you freaked out & do it religiously.

Why is it so hard to listen to normal/common-sense/un-sensational advices? Why do we listen to stupid advices? Are they really persuasive people? Do they really able to lure you? Maybe those unreasonable advices were able to get you extra attention from your peers? Or are we simply too stupid to differentiate good and bad advice?