No you really can't say that. Him going may have caused the government to not send somebody else... that is true.

IIRC it was some lottery system. So they would have drawn another number that day.

The 'had to serve' is the wrong thing to say. No American 'Had' to be in Vietnam

You went because you were drafted that's the way it was. What do you want from me, I didn't make the rules on conscription and the US wasn't the first/only place to use those rules.

The problem we have in the USA is not civil disobedience

....

It's what gets us Nazi concentration camps, gets Mao killing millions of people through incompetence and central planning. It's what gets us empty shelves in Venezuela. It's what gets us the largest population of prisoners in the world, who by an large did not steal anything or hurt anybody

I'm not saying to accept anything you don't agree with. I'm just not arrogant enough to preach to you about all these things wrong with societies. If you want to fight all these things, more power to you, but don't think that you are somehow morally superior just for stating the obvious. When you take significant personal risks, then we can talk about your valiant efforts. There's no shortage of people screaming about how others should act and what others should do, and telling others how they should think. There's a huge surplus of that, and it seems to correlate positively with entitlement. Opinions are just that, opinions. At some point all of these terrible things started off as opinions that a bunch of other people liked, but turned out much differently than expected. The problem isn't people who hold different opinions than you, the problem is people who expect everybody to hold specific opinions.