There is great misunderstanding about the amount of time and effort that goes into professional book cover and interior design. Apparently, artists have been vexed by this for a long time, as these two quotes illustrate:
Take great pains to make something look effortless.
--Michelangelo Buonarroti
“If you knew how much work went into it, you wouldn't call it genius.”
--Michelangelo Buonarroti