In simple term, the win made by the gambling house will be higher than that of the winning made by the gamblers. Every gambling script is developed in such a way with increased house edge. Different gambling websites give us with varied probabilities of winnings but the house edge of every site will be high than the players winning to assure profit for them.
That's true, they always has the house edge that's why they win most of the time.
Wit that house edge, that makes them more profitable but we can never say that we will not win, there are times we are lucky so we also have a chance to win.
Yes that is true but in some specific gambling games not in every game. For example, in sports gambling where you are free to bet on any team or player, it depending on your analysis and experience, there I do not think that houses can increases the chances of their win in sports betting except if they will fix the entire match.
Hence, I think sports betting is more reliable and increases the chances of your winning. I mostly like to play gambling on sports where I remain more confident to continue betting.