Can someone answer me why bitcoin dice games were introduced with the advent of bitcoin?
What makes it possible for these games to exist with bitcoin and not with fiat ?
There are plenty of dice games in the fiat world, they just aren't as common as card games and are a bit different. Satoshidice introduced dicing as more of a lottery system and then Primedice simplified it greatly and took it off chain. Amongst the dice games in standard fiat casinos there aren't really any games very similar to primedice, bitcoin sites seem to be embracing transparency in terms of showing all bets and encouraging social gameplay.
Not having to wait 2-3 days on deposits and withdrawals certainly makes this sort of fast paced gambling more exciting and relevant for bitcoin users as well.