None of the outside players in the losing teams have low OD, on the contrary they are good outside defenders.
You are probably talking about the OD team rating which is not directly involved in determining the match outcome. And of course, your idea would also work on the other side. The inside team OD is also making a double role: decreasing the quality of the shots taken by the outside team and preventing them to pass the ball each other. So finally, following your argument we have arrived to a nice and "unexpected" conclusion... : Inside teams need to have good outside defense to be competitive. Fantastic! ;-)
And I would add that good passing would make them much stronger towards the 3-2 zone. And if their C and PF have good passing skill, then who will stop them passing the ball each other? An outside team would need to train OD for their C and PFs?
Finally, I don´t know any "cheap" outside team. Maybe you buy players in another transfer list, because I think a good PG with a nice level of passing, jump shot, jump range and outside defense is not what I'd call "cheap".
¡Me aburro! (Homer Simpson)