If you don't have expcted returns greater than the total market, you should not trade. Your argument seems to be "yeah, assume there is no value or edge, and l

If you don't have expcted returns greater than the total market, you should not trade. Your argument seems to be "yeah, assume there is no value or edge, and let's just hope for variance in our favour" is what the majority of professional traders, funds, quants, and so on are all doing. If that isn't what you meant, I'd be interested in how you clarify it: what do you think they're doing, and why?