> Why don't they just use those people to adjust their odds faster for everybody else ?

The logic of bookies is simple: Don't do business with people who win more than they lose.

It doesn't matter how the customer is getting an edge. A brilliant algorithm? A complex arbitrage system? Deep insight from years studying the sport? Cheating? Time travel? The bookies don't care.

The only thing that matters is, if you win more than you lose you've got some sort of edge. And if you've got any sort of edge, it's more profitable not to do business with you.