This is why many players prefer games like Roulette or Baccarat to traditional slot machines, because
these slot machines obviously have a terrible house edge in general (e.g. at brick and mortar
casinos slots sometimes have a house edge of up to 30 % in my country, which is ridiculous).
I think that a lot of it comes down to game choice more than house edge. Roulette is a far more entertaining game than slots or dice in my opinion so I play it even though I know it has a higher house edge.
15% is normal for slots in my country. Why do the casinos (brick and mortar) not compete and advertise a lower house edge than their rivals? The advertise promotions and giveaways because that's what brings people in, not a 0.x% better house edge.
For some fiat casino you can say that most of them are choosing game instead of house edge but on bitcoin world you should really consider about house edge because most of them are using bot to play so house edge is really important to them. And most of them here can even calculate it well too or there is house edge calculator of you can't calculate it so everything is much more easier on crypto world
I still prefer house edge instead of variances of games. Of course there are many games fiat out there which is really attractive like roulette or may be blackjack but house edge does really matter imo if you want to play on crypto world