I really don't think that's true, you can put a lot of effort into a wrongheaded strategy, netting you no or bad results.
Conversely, a good strategy can get you good results without that much effort.
Wrongheaded strategies that net you bad results, often result in lessons and ideas that can be further pursued on their own merits.
Wrongheaded strategies that net you bad results, often result in lessons and ideas that can be further pursued on their own merits.