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

I'm just gonna leave this here... there will always be someone that doesn't know how to use a rifle, its sad, but true regardless of branch. (watch until about 1:30, rest is commentary)

Your question is incorrectly asked. All USAF personnel are trained/qualified on the M-16/M-4. Select personnel are trained on M-9 based on Carrerfeild, Duty position, or Special Duty assignment.

Your question should be, "Why aren't USAF personnel proficient on their primary duty weapon?"

The answer is simply mission requirements. The Air Force by design is not a forward fighting force. Air Force deploys to a secure location then generates alert aircraft flying force.

If you ever get a chance read your bases OPLAN requirements. It will answer a lot of your questions.

(Yes...carrerfield is misspelled, but I'm not re-typing half this post to correct it.)

Every member I new had train and qualify every year

I agree with you. I was in communications during my years of service. I was told to be sure to destroy the comm gear if we got overrun. WTF give me an M16 so I can defend my post and myself while destroying the gear. Anyway, government is to cheap to give ammo to the AF. My kid deployes to the big sand box tomorrow. He was allowed to fire the M4 for 40 rounds. That was the extent of his training.

These are the Instructions for AF weapons qualification and Arming Categories. Category A is Pararescue, SF, Combat Weather, TacP, Red Horse, etc,. Category B is everyone else that fills a deployment billet, they receive weapons training before deploying. The AF does not have the CATM personnel or training ammunition budget to qualify every Wrench Turner, Personnel or Services troop annually.

Additionally based on my experiences during the First Gulf War its not that safe giving everyone in the Air Force or the Army a damn rifle, we took them away from the tourists about a month in, the Army just never gave their admin and mechanics bullets and they still almost blew up the entire base.

"2.4. Weapons Training Requirements. AFI 36-2226, Combat Arms Program, contains specific training requirements for each arming group, personnel selected for overseas assignments, and personnel assigned to fill a unit type code (UTC) where qualification with duty
weapons must be met prior to authorizing personnel to bear firearms. AFCFMs may impose additional firearms proficiency or sustainment training policies once personnel are weapons qualified in accordance with AFI 36-2226. Only personnel task-certified through combat arms sections are authorized to conduct live-fire proficiency/sustainment training; refer to AFI 36-2226 for proficiency training requirements. Unit commanders must ensure the following training is completed.

2.4.1. Qualification Training Frequencies. Generally, Group A personnel with an arming requirement must complete weapons qualification annually and Group B personnel tasked to deploy complete weapons qualification during pre-deployment Just-in-Time training.
Specific weapons qualification training requirements and frequencies are directed by AFI 36-2226.

2.4.2. Overseas Assignments. Before being stationed overseas, personnel identified by personnel processing code (PPC) must receive small arms weapons training IAW AFI 36-2226 and use of force training IAW section 2.5. of this instruction.

2.4.3. Mobility Forces. All personnel assigned to fill a UTC receive small arms and use of force training as prescribed for their respective qualification group.

As a retired ANG I can say that most of my COMM unit were fairly proficient with the M-16 but not so much for any other weapons. The Air Force has had more hands-on with the M-16 than they did back in the 80's when the only time they saw it was during basic training. I've had 10 times more hands-on with the guard units I've been in than I ever did during my 80's active duty stent.

Security forces determines the requirements and conducts the training.

I served in maintenance, operations, and support and never felt qualified on the long gun. I took a few pistol classes since I retired and they were phenomenal. I would've taken commercial classes while I was on active duty had I known how good they were.

The impression that I had when I was in (ok, so it was the Brown Shoe days) was that all airmen DID have to at least qualify --- at least on the S&W .38 Special Service Revolver and the Colt M-16 ---- and most of us had to also include the Remington 410, the Colt M1911, and the Saco M-60.
Now, they don't??

I was a medic and qualified expert on the M-16 and the M9. I can also tell you what the difference is between an M-16 and an M-4. I don't knowcwhere you got your theory about us not being qualified rifleman but your ignorance looks poorly upon you.

The military has become much more complex than primitive kinetic combat. I would say that there are a lot of members of the Air Force whose more intellectual skills correlate with an aversion to aggression, and since the likelihood of them needing to operate a weapon is incredibly low, more priority is given to enabling the skills that provide the most value to the service. Keep in mind that more people died on D-Day than have died over 15 years in Afghanistan. War has changed dramatically, and we have adapted to it.