This isn't true. Very few places in the US run their books this way, and those that do limit your bet so most large bettors are still using beards. If you bet with someone who is moderately capable, for example Pinny, they will limit you then use your bets to reverse-engineer your strategy. Asian books are the only place where you can get action and, now, certain syndicates have become so large and dominant that they open lines earlier just for them. If you are only betting on outcomes, it is very hard to beat a line set by syndicate.