Because after all what else to they have to occupy their time with?
Any guesstimates of how many OSS survivors remain? If they were 20 years old in 1945, they would be almost 90 now.
At its peak, it employed some 30,000, most of who were likely to be in their 30’s or older. If there are 50 of them left, I would be surprised. Most of them would likely be administrative, not combatants.