I guess not all the time we need to become dependent on luck because all of our actions will have the result but of course in gambling, it is your choice to play or to make a risk and it is good to make yourself aware about the possible decisions you made like a limit of the designated amount you play and risk because not all day gambling gives a huge amount of winning to us.
Yes you are right that mate like you said not all the time we are lucky enough to earn every single bet because in the world of gambling we can not predict the outcome so we need to control and discipline ourselves. Because the more we bet big amounts then the more we loss so if we bet a small amount then expect that our loss is small too. And if we have our luck then for sure big amounts of winning we've earn.
The expectations of a gambler in any gamble it plays is to make profit by wining a game because it's something that you think of, before making your bet. I believe that gambling is something you know from your mindset that either you win or lose and some people who is addicted to gambling don't barley know their limit in gambling playing. But sometimes i blame who don't map a particular amount of money for gambling.