Everyone who has developed his own gambling strategies will believed they are the best, i wont doubt about that because that is what we are using on gambling and still fetch us wining sometimes, however, there is more need to be able to develop more on some of this strategies, revise on them and make use of additional ones to help have more better gambling experience, which is one of the best reason why we need to developed gambling strategy, so that we can enjoy gambling each time we are doing it.
Twisting your strategy from time to time will help you to achieve your goals, though not everyone is open in terms of trying to explore as they are already in the point that they believe that what they've created will gives them decent benefits, though in reality there's no accurate or any particular strategy that will guarantee a sure win when playing or betting.
Risk is always present it's just going to depends from how a gambler adjust and manage to stop when it's need them to do so, with good self-control it can minimize your potential losses.
Why won't they do it when doing it can give them a lot of benefits? And once they figured out that their current strategy is lousy, why will still they continue on using it? However, if you think there is no sure strategy, then twisting and turning it is only a waste of time, or maybe it still can improve their strategy even if it can't give them a guaranteed win, each time they play?
People need to realize that gambling is about having fun and taking less risk, not taking more risk in order to win more because it's already risky by default. Many people have failed for trying it. We don't need to add the casualties. There are still alternatives for it like trading, if we want to try and make money.