Not only some but almost all casino games are based on luck and less skills since this is gambling. Casino wants players to rely only on luck while they have the advantage due to house edge to guarantee the casino profit in long term since they are business.
Casinos are not luck based but the games they are providing are based on luck most of the slots like you wager your amount and then wait for the results to see if you are lucky or not.Even in skill based games like poker you can turn bad hand into good one with your strategy but can't ignore luck factors completely in them as at last they will help you to win.