The house makes money when people are losing, so I think it's in their interest to make it less likely that users will make money on it, that's why I think that's not a good idea, unless you're really into it for fun.
Obviously, whether or not some people will win or some people will not, the fact that they are winning or losing, some of it is gotten from the players pockets and other ways that they can get money. Ultimately, it's the house that is winning.
That is true, the house always wins in the end. There would be players that win but the amount of players that win are probably less than 1% of the total number of players if you look at it in the long run. Because gambling is the business of the casinos, they will always win in the end.