Many AF pilots would be instrument rated, however the weekend flyers would still not push their instrument flying skills to the limit on a regular basis and would likely only fly IFR recreationally in conditions that are marginally worse than what one could do under VFR.
That is why it would be prudent for these pilots who operate AF in their own aircraft to practice their IFR skills regularly on either desk top simulators or arrange for an instrument rating instructor to come with them while they practice instrument flying under the hood.