The thing that separates pros from "regs" is bet sizing's and bluffs. We all get dealt the same cards with the same frequency. The playing field is even for everyone. Being dealt and making a good hand is luck, knowing what bets your opponents will call or fold to is skill, and knowing when a
bluff will work is skill.
Playing
freerolls is mostly luck as players have nothing on the line and your need to make a hand become more important, therefore luck is needed. For instance, first hand in a freeroll on
pokerstars, two all-ins and I go all-in with J9s. Opponents had 99, and the other had ATo. J on the flop (I'm ahead) 9 on the turn. They hit their 1 outer to triple up, pure luck.