I'm not quite sure if I understand your point, but I'll play.
1. I never said that making sound, well managed investment is a gamble. When you invest in something, you are essentially putting your money/time on something that you believe will worth more than what is worth today (lets not talk about options and securities
).
2. It is not true that when you make money in the stock market, someone else lose their's. Investment is not a zero sum game.
3. You seem to believe that investing in stock market is illegitimate, but I think what you really mean is that there are unethical activities involving investing which I briefly mentioned in my original post. Enron, Countrywide, Leman Brothers, AIG etc all used sophisticated accounting techniques to inflate their value/mislead investors which are highly unethical and their CEOs/CFOs deserve to rot in hell.
Having that said, I still believe that someone with discipline and knowledge will benefit greatly by investing in the financial market than betting their retirement on slot machines.