If there are 100 people joining and to join unpopular tournaments like roulette or baccarat (with no wits and skills like what you said), your chance of winning is 1%. 1 out of 100. Doesn't this make your odds of winning even lesser than the casino house edge? If there are not many people playing, they wouldn't even start a tournament. Please, Genting have organised such tournaments for years, every year ask me to join, so many people join also. When there are such events, I don't even want to go and crowd with them
There are many international tournaments on Texas Hold Em Poker and this game is not played against the house but against fellow players. Players play and engage in psychological warfare, probability. A game where you need to use your brain to win.