Then there was Joe Namath. Classified 4-F (physically unfit for any military duty) the same year he quarterbacked the Jets to a Superbowl victory.
Nice to have influential employers.
Just the opposite was John F. Kennedy. He tried to enlist but flunked the physical, so he worked out six hours a day for several months. But he flunked it again. He told his dad, who was the richest man in America, "You'll just have to find me a better doctor." They did.
There was a big difference between WWII and Viet Nam.