most commmon people lack the necessary skills to do well in "real" games.
You'd have to live where I live to see the effect. Even young people game, though perhaps less than adults.
But slot machines are getting more and more sophisticated. Many games have graphics and such on them. Check out games like Texas Tee (or is it Tea?), and I think Addam's family as well. These are the specialty games. You can put in 45 coins a pop on those. 9 lines times 5 bet per line. It's really a digital form of a slot reel machine. But if you get a special win you can go into a bonus round that has better graphics.