While I'm sure there is some of this mentality among unpolished artists, I think you're wrongly conflating reproducibility of quality with creativity itself. A creative solution is often arrived at by the ability to generate a large number of ideas, iterating upon each or combining them in a novel fashion. The simplicity or lack of inhibition in the approach of an amateur can allow for this volume, because the amateur is not limited by the constraints of a more formal practice. These purposely hem in what is possible in exchange for useful constraints that result in work of a reliable quality. Successful artists have to learn balance the pursuit of technique without being stifled by its preciousness, in the same way that amateurs have to balance novelty with reproducibility. Excess in either case tends to result in poor work.