People pay a lot of money to Chiropracters too, because they believe they are "useful." If you could not explain in simple language how your designs were going to benefit me, you would not get one penny from me (just as no chiropracter does). But, P.T. Barnum was right, there is a sucker born every minute. Some con artists actually believe they are performing a useful service.
I am not accusing you of anything. I am certain you intend to provide designs that are of real value to your clients. My point is only that what someone is willing to pay for is proof of nothing.
Hank