When you have an edge you want to get money in on it because "net edge times volume equals the earn." It's the formula I use and the formula used by the casino. You aren't going to make any money if you don't collect positive EV. If you own a roulette wheel would you rather see just one player there or ten players there. The more players making bets the more EV you collect, hence the more money you make. Are you going to have some bad days? Yes, but so what? It could be that on your best day of collecting EV you didn't win much on the wheel or you actually lost money....but you still want to have those high volume days. You still want to keep collecting as much positive EV as you can.

It is not a requirement that negative expectation gamblers like Alan understand what collecting positive EV is all about for it to work.