Yes, I agree with you that I like more the dice games as it is so simple. I'm gambling on, regardless of the site, I start with the dice game first. Because it is much easier to play the dice game. Anyone can easily play a dice game. The dice game comes into play with much less money. So the dice game is my first preference. If luck is good, with the dice game, you can make a lot of money and that is what people in bitcoin gambling usually want.
Some casinos are now starting to add a sportsbook in their platform, they maybe realize it could boost their profit, so they are upgrading.
True that dice is the simplest form of gambling as you only need to roll, hope your are lucky and then you win, however, this kind of games could be boring in the long run as people are looking to be challenge and they want to gamble with decent money so they will ensure there's no house or if there is, it should be a little so their chance of winning will improve.