So and old timer liked an old time design...There is no way in Hades I would ever pick a Mini 14 over an AR/M16 for anything, except under our wonky firearms laws. And I don't think Cooper knew a heck of a lot about the M16 either.
Even at the time, from which we've moved forward about half a century.
Someone saying Garand style actions are more reliable than a professional AR is good for a chuckle though, and he admits he didn't give the mini a tough testing.