^If you are able to win that
is all about luck and not just because how much the percentage of the odds.
But you are definitely right, manage your temper and your greed so that you don't have a big loss, the thing that causes you to become an empty pocket is that you are chasing your loss. Whatever happens, don't chase your loss because it may lead to frustration while gambling, and it can be out of your focus. So for me, gambling is based on luck and nothing more, stop when luck was not on your side.
Of course it really has to do with how big the percentage of available odds is. a matter of luck, that is another matter. but based on the odds, the dealer gives the percentage of which team is more superior to win the match. imagine, if in a sports match it is only about luck. then, why do bookies provide varying odds. So, it's about the skills of the players, the depth of the team, the strength of the team, because of that the bookie gives lower odds on the stronger team. and gives high odds, to the opposing team that is not favored.
But by the way, I agree with the other points you mentioned. at least, we must avoid chasing losses that have been lost before and make gambling just entertainment and fun.