Wondering again

I am deeply puzzled.  Parents, all over town are running (jogging) for miles while pushing a cart containing children of various ages.  Hooray for the active parents.  What message though is this sending to the little 'riders'?  What possible messages could they be receiving after their 'lengthy' rides?   Wouldn't they be better off and  healthier staying at home running around the yard or playing outdoor games or even indoor ones?  What is wrong with this picture?  How can it be corrected?.......................marge