Sonny isn't denying the existence of luck. What I heard him say was that in his planning his play--bankroll determination, RoR, acquired playing skill, rules/game selection, betting progression, etc.--he has effectively nullified any effect that luck might otherwise have, except for the one in a million shot that no one in their right mind plans for. Done properly, one can be as near to a sure winner as humanly possible--bad luck or good luck, doesn't matter. Running sims can tell you how you're doing in terms of your plan better than just eyeballing can. As a practical matter, if you plan and execute properly, you can't lose.
Hope I didn't put any words in your mouth, Sonny.
PS--"As a practical matter" is key. There is no sure thing. You know what I mean. Like Shadroch says, if a brick falls on your head, all bets are off!