The result? Those persons are now broke , divorced from their wives and are miserable right now. What I want to say is that a strategy can only work for a very short amount of time and not in a continuous way.
In my opinion it is unfair to easily conclude that making strategies are pointless because at the end of the day you will lose. Strategies, even if it is as complicated as having mathematical calculations or as simple as a smart guess, are still beneficial. If you are losing then it could be either your strategy doesn't suit to your game or the problem is within in you. I mean, you will not really have a bright future even how effective your strategy is if you are a "One day rich man" or uncontrollably spend your money to buy not so important things in short, not a wise money holder.