Slot is one of the most preferred gaming game in most casino houses and online gambling platforms but one of it major defector is the fact that players can not give an accurate forecast of the outcome of the game and how the probably fair system works in favor of the house. Apart from dice that it outcome can easily be predicted slot on the other hand is unpredictable.
It's because just as dice, it's a game of luck. Coming from the word itself, forecast, you're just giving possible results but they're not accurate at all.
As result, as you've said it is unpredictable so the house is always having a high chance of winning. There are gamblers that are lucky with this game but in most of the time, it's all about the house.
Slot is a basically luck game but in most casino house the house edge is always high and that result in player's always losing to the house because the slot machine are set to favor the house. I will prefer to play dice instead as it outcome is more predictable.
In the long term, the house always wins. So if you've once or twice won with a good amount, take that win and cashout it to enjoy.
As result, as you've said it is unpredictable so the house is always having a high chance of winning. There are gamblers that are lucky with this game but in most of the time, it's all about the house.
In dice games the chance that the House will win is usually not that high. Btcgosu.com has a nice overview of the most common casinos and their house edges:
SourceAs you can see, this already starts at 0.8%, which means that you have a 49.2% chance of winning a game and the house just 50.8%.
Thanks, I'm not good in statistics but this speaks the difference between dice and slot for the association with the house. Others might find it very little difference but that's still the actual difference.