I agree that there is no perfect strategy. You can do your best to make your strategy as good as possible, see if you can optimize it. But you will always play against your own disadvantage. Or you have to keep yourself busy with arbitrage betting if vaue betting, but you can't do that for too long because it's a matter of time before the bookmaker realizes that and then you get a block. And in a casino, a strategue has no jack at all, because arbitrage bets do not exist there, of course, or their software must be broken.
There is indeed no perfect strategy, but with this you can be more responsible and you can know at least how to gamble properly with no high expectation at all. Gambling is a game of luck and probability, if you’re not lucky don’t expect to make money. I see strategies as being a responsible gambler, but if you are relying too much on this then I think you might be disappointed when you didn’t win at all. There’s no perfect thing about gambling, its all about luck and your attitude towards gambling.