why we lose (even if the site is 100% fair)?
the answer is very simple -snip-
Yeah. That's how house edge works.
But even if there is a statistical loss, gamblers like to take the chance to win. After all, life is full of unfair risksgambling is no different. In relation to zero house edge, you are expected to approach your original bankroll as you gamble more. If you want this to happen then you would simply bet the minimum at the highest chance and continue betting for eternity. Think of it like betting on black & red at Roulette without any 0's.
But this is all irrelevant because the site
isn't fair and they cheat players.