If he wanted to enlist, sure, he could have fixed it. Not enlisting isn't the same as avoiding service.
And assuming I'm right that this was in the 70-71 time frame, his draft board would have called him back in 6 mo or a year later (I assume these thinks don't always last forever).
Wonder if he's lurking here, laughing his cyst off?
should have been
his draft board would have called him back in 6 mo or a year later (I assume these things don't always last forever) if it had happened a few years earlier.