Art comes from the soul. Anything that does not, is not. Good art comes from practice, or very rarely, dumb luck. The medium you use is unimportant. Pigments are, literally, ground up, reprocessed dirt, for just a single example. Theodore Sturgeon once said, "Ninety percent of everything is crap! He was wrong. Everything since a splintered nanosecond after the start of the big bang is recycled waste. Don't let the cretin upset you. Next time you run into that attitude, skewer the poor, unsuspecting dolt with your best steely, penetrating gaze, and in a quiet but very firm voice, quote Strugeon at him/her/it/they/whatever. Then laugh in their face. After all, they earned it.