Every player has different preferences when it comes to gambling. Some may feel the same way as you but some may not. After all, what matters is the enjoyment that a player gets when playing and the fact that the player gains something from doing it. And yes, I agree that regardless of gambling techniques players do, sometimes luck may become hindrance.
Two factors on which people make a choice between playing slots or dice. This is a pleasure and an opportunity to earn money. I am sure that most players make choices based on their ability to make money in these games.