~snip~
I disagree, gambling is about testing our luck, now losing big and losing more is up to our decision. Gambling if controlled can give us good profits. That is quitting while we are ahead and playing again after some time for a fresh session. I do agree that we shouldn't expect too much though because it will be a disappointment if we do since prolonging our session in gambling will oftentimes drain our bankroll. I often experience this by having my bankroll increase to 2x and being greedy playing longer in hopes to make it x3 often ends up in an empty bankroll. This means the control of whether we end up with a positive bankroll depends on our luck and our decision to stop.
It doesn't really matter if you start a fresh session or you gamble all in one session.
The math is still the same, and it basically means that the house will win in the long term.
You would need to win big and then
never ever gamble again to actually end up positive against the house.
The issue is that the whole gambling industry is designed to keep people gambling as long as they can and coming back all the time(free drinks, food, no sign of time passing, etc), because they know that in the long term they will win given the odds they are offering.