Why do you think this is true? For every trade, there is someone on each side. The market as a whole does not care if you make bad trading decisions. Someone else makes up for it.

I think our money needs to be working towards things that we actually care about: advancing science and technology, creating art, socializing, and so on. Putting it all into a big game of craps is not going to improve the human condition in the long run. I mean, it's an interesting game, but not interesting enough to justify the entire economy revolving around it. And people don't play because they find it interesting.