Being on TV has nothing to do with "exposure" to pro scouts.
Yes it does. Pro scouts cant be at every football game for every school. They use film to judge players just as much as they use their own eyes. Go watch some player documentaries for greats who played in college during that period. They would always say they wanted to have their best games during a bowl game or against Alabama, ND, USC, etc...because they knew the scouts would see their play then. Plenty of players have stated they went to ND simply because they were on TV all the time.
The kids would also want to be on tv so their friends and family could see them play.