Yes, risk management is important, and switching from one strategy to another is not the best decision. However, no one is immune to a prolonged losing streak during gambling. So, I think it's at times like these that a gambler may think that his strategy is useless and not working, and that he needs to try something else.
Yes, it is true that any strategy does not exclude losses or even a series of losses. But when you face a big losing streak, you start looking for reasons, and one of them might be that you think your strategy has simply stopped working. But finding a new strategy is not as easy as it seems. We settle on a certain strategy after a long search because it seems like the best choice for us, and when it stops working, it even feels like you have hit a dead end. Because going back to old strategies that were worse is something you definitely do not want to do.