But I don't think we would be many to say that you can get success by JUST luck. It's rather about luck being a part of success of a good product, but you can change 'luck' into 'chance' or even 'random selection'.
I don't know much about the comic business, but I know other competitive fields and how Internet affected them from the 1990' onward.. Well, I would say that's exactly why we spent increasingly more time and money on marketing strategies. There is an abundance of potentially easily accessible excellent products, that are made inaccessible by their sheer number; marketing is simply rising our probabilities to be picked in the sample, so that we are not just counting on... luck.
But to push things to the absurd, are we artists if we spend most of our time promoting? (not pointing fingers, just an honest question. Seems like a different job to me). To be honest, I'm very happy to be just a small amateur. The situation looks very depressing to me.
(ironically, when I typed 'onward' to verify spelling, I only got the Disney movie in the first page, nothing else! No dictionary etc! And I have no interest in Disney, so no (pertinent) influence of previous researches. There we are... sigh