Bama: Rushing Leaders

With their abundance of talented running backs, isn’t it odd that Hurts leads the team with 85 rushing attempts. Harris averages 8.5 ypc but averages less than 10 carries per game. Any theories on this? I know RPO has changed college football, but this seems odd. Is Bama trying to prepare Hurts to possibly become an NFL qb or are they doing what Meyer did to Tebow...using his athleticism and not giving a crap about his development as a qb