Sign up for the National Guard - even for a specialty which requires a substantial commitment to active duty for training and makes you the tip of the NG spear - and cynics will say that if you didn't get killed in Viet Nam you are a draft dodger and not qualified to use the military in accordance with the Constitution. Decide to allow that training to lapse after historical changes have reduced the call for people with that training, and cynics will second guess that.But be cynical about American culture and values, urge people to refuse military service, and oppose funding the American military for thirty years, and you will be the cynic's choice for president.
If you want to know why I'm what you call a cynic you have only to look at your defensive rationalizations.