Of course its luck. I dont want to say 100% but pretty close. I give 10% to skills, or i say its more like diligence or hard work what you need besides luck to be profitable.
How people can say its more skills, im amazed.
I dont know any profession, or anything att all, where you can get kick in the head for months, by only doing right thing, doing best possible decicions. Folks, its a card game, and those 52 cards on the deck,+other players+all the hidden knowledge, etc., make sure, that only the luckiest ones make serious money. Hard work helps sure, and that 10+% can carry you deeper in the tournaments then others yes, but to win money often enough to make living from it, you need to win those 45/55 or so situations at the end of tournaments.
I dont know. For me this is obvious. If i build a house just like intructions says, doing it correct by the book god damn ten times, and still, at some point house falls down.
If something needs studying and training and hours of work, i like to get rewarded from that, im earning that money without feeling lucky at all