The reason to play the low range guy in RF is two fold.
1. Less opportunities. In this game, the best RF have a RF of 1.75-1.80. That's a little lower than MLB which I think is just over 2.
2. The game makes AA/AS the "important" ratings in RF. C have good arms, poor range and weak gloves.
Anyway, as you can see with my experiments(that are actually players now), the C turned RF costs you 50-70 plays per 162. I'd argue that it might be less in MLB if someone like Russell Martin played RF for a full season. A manager could "pitch away" from that side of the field thus limiting his opps. Can't do that in HBD.