Because these people are great salesmen, not unlike people who are super successful at car sales, door to door sales, business sales, etc.
They know their customer, know how to get them to see value in what they are selling and how to trigger them to buy.
Instead of dissing them, you should be trying to learn from them. Obviously not taking the fake stuff, but there is plenty you could learn about how they do it and use it to your advantage.
There is something you can learn from just about anyone who is good at something you are not or does something you don't, and incorporate it into what you do to help you become better at it.