How do you feel, knowing that 75% of young Americans cannot make the grade to even be considered for military service?

Growing up in a family where most had served in the military, and many more were planning on serving at some point, our lifestyle was such that we didn't think much of being eligible for the military, we simply assumed we would be.
School was a given, as were early morning and afternoon chores, because that is what my parents expected of us, and quite frankly, the only people I knew who would not be able to join the military, were a few friends who'd had physical problems in childhood such as asthma or accidents of some sort that left them with a disability.
I worry now, that we are raising a generation who have no concept of service to our country, that I wonder who will pick up the torch when we have handed it off. So many are overweight by a LOT, have no drive or ambition to be better than they are... have no diploma, and certainly no wish to do something other than play video games, that I have to wonder, of the supposed, 25% of young adults who are eligible for military service, how do we reach them, in this day and age?