The problem is that even a basic understanding of football renders your entire argument invalid.
The WR not only has to deal with his coverage (single-, double-, triple-, zone, bracket, etc., etc.), but he is also dependent upon the QB to get him the ball. When your QB forces the ball to him, he is not only likely to be looking away from better (read: more open) options on that play, but he is also likely to cause a turnover, which are more easily advanced for big gains than a RB turnover (read: fumble).
The RB is dependent only on the QB to give him the ball (which is failsafe 99.5% of the time), and the other 9 players to block. When your RB is going well, no one is going to complain if he gets the ball 40-50 times a game. If he's not going well, he gets benched. Pretty simple. When have you seen a WR get benched for not getting the ball thrown to him? Exactly.
A good college RB will carry the ball upwards of 300 times in a season. Even the best college WR will catch the ball maybe 100 times in a season. There is a reason for this.
Your whole argument is akin to complaining that we need to bench our DT because he's not getting enough interceptions.