I agree with the idea that greed often leads a gambler to a greater number of losses and also more significant disappointments, but for the issue of results in gambling it is another thing, meaning that defeat is not caused because your strategy is bad but because you are far from luck, and moreover in gambling regardless of what type of game it is, there is still no strategy that can guarantee victory, in sports betting it is nothing more than a tool to get us closer to victory, but in casino games it is really useless at all. So actually don't let you have the idea that defeat occurs because you have the wrong strategy, because it will only make you continue to look for various other strategies in order to pursue victory which indirectly can also make you think that victory depends on strategy and not luck.
You’re absolutely right that luck plays the most vital roles in ensuring a gambler’s success, but let’s take our time to analyze some situations with all honesty, strategies while they’re not the major guarantee for success also have a role to play too, just as you rightly said, our strategies gets us a step or two closer to victory, thus a bad strategy also takes us one step or two away from success ( at least that’s what I think) so I believe it’s important to first keep our strategy in check, rather than solely depending on luck for success. We need to first make sure that our strategies are quite effective and actually takes us closer to victory.