The OP wants to find a winning strategy and it doesn't ask about certain games or casinos. From this I conclude that the OP does not have any information on this topic and he is looking for ways to make money.
Here, the correct advice was given in relation to the fact that gambling regularly does not earn money.
By the way, you are right. In fact, there is no specific strategy on how to win at the casino. If the OP created a topic for a specific game, for example, Dice or Roulette or Slots, then probably he was prompted by several strategies with which he could work and understand how these games work. Therefore, his initial question a priori will not bring the answer he needs.
Yeah, gambling is very complex and there's no specific and precise strategy that can be used to win especially when you're playing probability gambling games like dice. But if he/she's playing poker and other gambling games that have complex mechanics, there are few strategies he can use like bluffing the enemy.
The only strategy we should deal in gambling is to have balance and don't get addicted to it because once you're in addiction, you already lose in life.