On the other hand, one of the weaknesses when you only rely on one strategy is of course it will be quite difficult for you to find the moment to open a trade because not every time the market will form a moment like the strategy you have, therefore most traders prefer to learn more than one strategy, namely so that when there is no moment for strategy A, for example, then there is a possibility for them to find another moment for strategies B and C, that's the reason.
But in essence to become a successful trader, you do need to master several trading strategies, the more you master, the broader and more diverse your insight in seeing the moment will be. However, it is possible that with one strategy if you have mastered the market and know every corner and condition that can or should be used for trading, it will also be better. The point is that every trader must be able and needs to evaluate trading and be confident in the trading strategy that you have tested yourself.