Playing a pointless game in the driving rain in Orlando is probably not what most NFL players consider a reward. Given the physical nature of the high contact contest, football simply does not translate for an all star game like other major sports. In order to prevent injury, the intensity of play becomes diluted to a point that fans are given a less-than-stellar product.
As opposed to college senior bowls that give players an opportunity to display their skills and improve their draft stock, the Pro Bowl is an honor but not a platform for players to market themselves.