As told by a designer who works for money.
To get design's full value, you need to hire a professional.
Design is not the frosting or the sprinkles.
It's the whole goddamn cupcake.
But their work proves their ability to solve your problem.
Do you say this to your doctor? No? Then why us?
But you're wasting your money for him/her to make it.
It's about the value. Plain and simple.
Give the designer enough information to do their job.
Let's never use it again. K thanks
Easy solution: don't be afraid to admit you fucked up.
Bad designers will get defensive.
Good designers will appreciate your honesty.
Seriously, it's that simple.
(and touch faith)