Why does the media pick on school lunches and not the fact that schools offer very little PE for children?

I’ve seen countless of shows speaking about how the schools offer unhealthy lunches but none that focus on the lack of PE in the schools.
Physical Education has been side lined to an extra curricular activity and no longer is made manditory till the 12th grade.
Kids hardly play outside as it is with all the play stations and parents who don’t get home till dinner time. School becomes the only time for them to get some physical activities in a safe enviroment.
Its funny how our society talks a great deal about making sure your dog gets enough exercise but not your children.
Easy to blame being over weight on food, but sitting in front of the tv playing games or on the computer or sitting in the class, couldn’t possibly be the biggest culprit.
When I went to school. PE was difficult but we all had to do it. Only those with special health issues accompanied by a doctors note were dismissed.
So if you had to choose what you thing is the biggest culprit between school lunches and lack of PE. Who would you pick?