It seems that I have to disagree with you on that too. As I see it, you could in fact say something about bad luck if a casino actually had a zero house edge because it would all come down to pure chance whether you win or lose. But if there is a certain positive house edge, it is no more about luck, it is about statistics. In other words, your bad luck will have pretty mundane and trivial causes.
this is how the house really taking advantage, if you are thinking that with gambling you can grow your btc then think deeper
and always think twice.
Of course we should consider greater house edge as one the reasons we lose on a gambling site, but what I'm trying to say is that in my opinion it is not the main reason. I've noticed that some gamblers are looking for sites with smaller house edge and when they find one they think they can make money there, and I want to say to those gamblers that bad luck is the main reason they lose, not the house edge.
What can I say?
If you lose once it is bad luck, if you lose twice it is coincidence, but if you lose thrice it is statistics! It may be pleasant and soothing to think that you are just an unlucky bastard, thereby removing any responsibility for your failure, but if you lose time after time, there's something else to it besides just lack of luck. As Albert Einstein famously put it, insanity is doing the same thing over and over again and expecting different results.