That's true - placing to win bets will bring better odds, but wouldn't it be better to have a fall back position to recover your bets if the teams drew a draw?
It solely depends on what you are targeting. Lets say you have targets of winning large odds, the solution will be to choose an outright result, which is a win or loss or draw, but if you care about the safety of what funds you have invested then the best approach will be multiple choices as this will give you a better shot at recoping your funds instead of a loss.
As it always is, an outright choice gives a better odd than choosing multiple options.