Why don't all members of the Air Force have to be fully qualified to be a rifleman in case of hostile events?

I went into the air force on Dec 14, 1970.. in basic I had to qualify with the m16.. and then again the second time when being sent over sea again.

I agree completely. I was in the air force during Viet Nam. I never had to go there but I heard stories about the Tet offendive and some airmen had to rely on army troops when their air base was overrun. I always worried abput not being fully trained with a weapon.

I will be blunt and to the point. The Air Force comes from the Army Air Corps, any lineage claimed from WWI and WWII is to Army Air Corps, not Air Force.
There are different thoughts on way the Air Corps left the Army, more then some was political. It gets convoluted beyond that. (My Grandfather stayed Army, my Great Uncle became Air Force, both served as Army Air Corps during WWII; both retired as Colonels.)
Both have since passed, they would be apalled to see the state of the current military.
From a retired fu#@, quit asking and make it right. Doesn't matter your branch, your push to the fight does. If that is no longer taught, we have failed.

M_9 is what i was equiped with grate close combat gun for long distance m-16 came in handy it dosent jam as offten then most all thogh i. Trew it in the mud to see what it well do it did jam for proxamently of a mil a sec then fix the spring magazine. That jamed

In the 80's, I was sent from Bragg to the pentagon TDY. From the Pentagon, a small team of us, including a young Navy type was sent to El Salvador to provide some training. One night while in the southern part of the country a host country training base was hit by the bad guys. Our site was removed from that site but you could hear some of the explosions in the distance and we quickly set up on the perimeter. I was stuck in one position with the navy guy. Real nice guy, proficient in his specialty, and very smart, but no idea about how to use an M-16. I did what I could in a few seconds not knowing if we would be hit. I locked and loaded for him, placed it in safe mode and told him where to aim. I stressed not to open fire until he heard from me as there were friendlies walking the perimeter. Anyway, a long winded way to say you just never know when danger will head your way, especially these days I thank God we were not hit and would have felt better if this kid had received some minimal training. It wasn't his fault, just the system

What AFSCs are issued weapons besides the police and various aircrew and pararescue?

Sad thing is, after I retired I got an M4 style 5.56 rifle and have shot more rounds in the last few months than I did in 24 years in the Air Force. I was an avid hunter and a good shot (made Expert although I never turned it in to the personnel office because I didn't want to have to add another damn ribbon to my rack). I would have loved to have practiced more with the M-16. Lord knows I was a good shot with my 30-30 and 22LR.

I served 3.5 years in the Army 69 -73. Got out and came back into the ANG Mech in 89 and discovered I had gotten to soft to be a grunt. I was ready to throw in the towel when an AFRES recruiter enticed me. I switched to Air Force. Compared to mechanized infantry it was like a vacation on week-ends' I can best describe the Air Force as "Kind of Military!" I did enjoy 17 years in the Air Force 605/2T2 and worked with a lot of great Airmen. Uh or is it AirPeople? I never was politically correct nor did I ever mean to be insulting. A WAC is a WAC, a WAV a WAV and God Bless the Donut Dollies.
All that being said I was a LRRP, an Aero Scout in OH6As. I worked and or trained with Rangers, Seals, SF. I do believe the most amazing men I ever worked with were the air Force Green Foot para-rescue.
Like I said the Air
force is "mostly" kind of military so AirPeople mostly are not down for a real fire fight.

SF defend the base and resources, Army and Marines take the fight to the enemy... so so you want the tech who keeps the AC flying carring a gun or working a wrench... if you have called CAS you know the answer

What does the term "Armed Forces" really mean? While I was in I was pleased to spend time on the range with any of a number of weapons. My QRF assigned weapon was the wonderful M-60 (I qualified with this weapon.) We should all have a basic understanding of at least one side arm and one long gun. Training and re-qual should occur on at least a semi-annual basis - no exceptions.