You have your opinion, I have mine. I spent 2 years in Vietnam. I don't know of anyone in the line companies I was in that didn't fire tons of ammo downrange. I remember once having to back off and postpone the war while the squadron took on 11 chinook loads of fuel and ammo. Backing off was out of direct rifle fire. We started with 105 vehicles running and finished the 4 days with 65. We shot ammo by the thousands. The difference in Military and your home town heros, when you're in a war zone you do it 24/7. My longest stint in the woods was 43 days hunting. Admittedly, admin types in the rear and support people rarely fired a shot. Fireman work what, 2 or 3 days a week. Police work a shift. As far as teachers staying late... they can't. Lawsuits and claims of touching etc have gotten things to the point a teacher cannot be alone with someone. When my wife taught the last few years they were told under NO circumstances do you put yourself alone with a child. They're not allowed to give a kid a ride or anything because of lawsuits. They are required by law to have a plan to suit each childs need. Extremely difficult with the inclusion rules. Teachers today are more like a warden because the laws and liberals demand no one be left behind and throw all in a big pot.
Below is a crop from Vietnam statistics. If you'll note, the highest casualty rate for all MOS's including aircraft, helicopters, infantry and all was armored cavalry crewman. We lost 27 percent KIA. Don't tell me we didn't shoot bullets. This is from National Archive Statistics.
http://www.rjsmith.com/kia_tbl.html