Sometimes most traders think maximizing lots of strategies will results in quick actions but it differs, yes a profitable market depends on a good strategy in as much as you can be consistent in it. And clearly sticking to a particular strategy doesn't seem profitable in the long run as things tends to change this is more reason one get to hold on to different strategies while working with one.
Indeed, because working in the market by becoming a trader must have many ways to be able to avoid losses and can have more opportunities to be profitable. Because as you said that one strategy alone is clearly not enough for every trader because the existing strategy is sometimes not suitable for the long term or less suitable when there are conditions that make the market change. So traders do have to have more ways so that at certain moments we can use the right strategy in order to gain profit in a short time.