A lot of new players that I know of don't even know the rules of a lot of cards games, even blackjack. Besides, the house edge on these games are essentially magnified if you don't know what you're doing, while the house edge is a constant if you just play dice, and it is relatively low as well between 0.8-1% usually in this industry.
I think this trend will continue as new players get introduced to these games as well, as the learning curve for dice is just so much easier.
Indeed, that's making it so simple for most players who've been playing at top priority. However, dice games is more popular rather than card games due to simple, yet profitable. As people tried to learn it's simplicity, increasing number of playing population is always feasible.