Thats exactly point dumper, trading is a zero-sum gambling game. Investing is not merely gambling, and people who don't see that are missing the point.
For the equity market to function, it needs both traders ( gamblers ) and investors participating.
If the gamblers want to dominate the market completely with their spivery and frauds, then real investors will shun the market and the traders may find it a much less interesting place to operate.