You'd lose plenty of money. "Odds on look on" is sage advice going back to the beginning of punting. Some specialist punters might make a go of it on Betfair perhaps, but generally speaking the saying holds true.

In my silly days of punting, I once stuck a run of 7 odds-on outs at $300 a pop per bet and almost wiped out a $2,500 profit I had up on IAS.