Games similar to Dice or slots are mainly created for fun. Because in such games, you can't predict the outcome nor speculate on them. You are totally dependent on your luck. If it fetches you some money, that's the cherry on the top of the cake.
I consider only sports gambling as a serious method of making money. Even through sports gambling is also a speculative activity, but a lot of considerations takes place before every bet. Rest all arr for fun only!
I don't know if it's true or not, I heard that someone username, then the slot machine and dice system has indeed been set up so that we lose/win according to the applicable time. It attracts a lot of visitors and it is all done to trick the gamblers into feeling addicted which in the end tends to not control the emotions. While considering gambling as an alternative to pleasure, it is much more rational and easy to control by oneself and does not follow the games played by casino owners.
I agree, sports betting is more real, objective and far from being manipulated. After all, it is an effective gambling. So it's no wonder the big gamblers are always there, horse racing, boxing, golf and things we can witness firsthand. Consider slot and craps games will be susceptible to casino manipulation.