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Try to use someone else's strategy and you'll realize that it won't have a constant positive result no matter how you modify it. Gambling sites are very familiar with different strategies and use protection against them, plus some of them will simply ban your account without explanation if you can develop a winning strategy.
Maybe that is because we need the luck to win. After all, I think luck will give you a chance, whether you use someone else's strategy or did not use any strategy. The gambling sites can do the worst thing is ban our account without explanation because they think we do something that makes us win. Maybe learning some strategies can help us improve our skills and knowledge that we can use many strategies to gamble but do not rely on that strategy because that will not always work.