Yes the Grim Reaper using pneumonia and its complications can take down anyone, no matter their overall physical condition. I’m 70.
It’s a scary story for those of us who are 70 and north thereof. If I took a random sample of 20 year old male college students, I bet Ermey could have out performed at least half of them in physical fitness tests; nevertheless he dropped before I did, and I’m older. Disturbing.