He was saying it would've been easy for the shooter in question (ie, a random 20-year old).
Mind you, that former sniper was also a Republican congressman so I would not be surprised if he was just using the opportunity to build the Trump Messiah narrative.
I'm a god-forsaken liberal with <200 hours range time and I tend to agree. On your 3rd or 4th practice you should be able to put 3 in the 3rd ring at 100 yards.
The real mistake was not going for center mass on someone over 70. A gut wound or lung or even a sizeable chunk from meaty tissue anywhere on the body could put down someone that age from blood loss. There's no achievements for head shots in real life.
Mind you, that former sniper was also a Republican congressman so I would not be surprised if he was just using the opportunity to build the Trump Messiah narrative.