re: Why would any parent push their child to play RB?

How many of these kids switch to RB after the potential of playing at a higher level is displayed? Not many I'd presume, as youth coaches into High School are going to put their best athletes at the positions that garners the most opportunity to win.. RB/QB are those positions in youth football. Id be willing to bet that most WR's played RB at some point in lower levels only to move to the WR once their full size was realized and or the team had a better RB.