The perception that house always win is wrong. If it was true, then why still many people are playing gambling. I think gambling is also profitable for the players as it is profitable for the house itself. The thing to note is that both gamblers and casino are increasing day by day. This is only due to the reason that gambling is beneficial for the both.
In some point it is wrong but the players that are too greedy just proved it correct. The house dont win all the times and players win sometimes though some of them losses their profit because of greed they think they can win more