I think too many people as luck in poker. There is really no luck its all probability. If you play a hand that is 80% to win in the long run it will win 80% and lose 20% of the times you pay it. You may increase the chances of losing by playing the hand poorly, example letting too many people see the flop will reduce your probability of winning. But if your AA gets beat by 69 because you let the 69 see a flop that is not lucky for him but bad playing on your part. Even if the 69 called your all in preflop and 669 flops its not luck its just the 16% time that 69 beats AA. If you hit an Ace on the river its not luck its just the 4% of the time that it happens. The only time I feel im lucky is when I sit down to a table of bad players.
I think luck is not a matter, sometimes we're unlucky but sometimes we're lucky. So if we play correctly, we will make a profit. I often review my hands with ICM to know when I should shove my hands rather than thinking about luck.
The more players in the tournament, the more factors should help You to win the tournament. It is very difficult to win just on skill, this is poker, anything can happen.
No one wins anything without some luck involved. Luck is not just getting lucky with a 3 outter or something. What cards you are dealt. What cards villains are dealt. When they are dealt. Those also all involve luck.
You can make good decisions which increases your odds, but since poker is a game of incomplete information, you cannot make correct decisions 100% of the time.