So you're going to vote for TheDrake's Aunt Millie, too? Since 95% of voters select either the Democratic or Republican candidate, you'll have absolutely no impact on how the next President will act. But you'll know you did the right thing, anyway, because neither of them deserves your vote.
Yes, it's most convenient! You can do anything you like, ruin nations abroad, divide the American populace, and anything else, and then always fall back on "hey, who else is there to vote for"? The only reason this didn't already devolve in a revolution is because America is too prosperous; give people lots of stuff and they won't muster up much energy to be upset at the same things that would lead to revolt in poorer countries. Why change when you don't have to? Answer: you won't, so the DNC and RNC can just have at it. You can point that out as a reality, but I don't see any reason to celebrate it as you seem to do.
It is an interesting point you bring up, but at the same time, it also points out just how much of an aberration the American Revolution (or even the Civil War) truly was.
Most revolutions only happen once a substantial portion of the population has reached the point that they have "nothing to lose" by rebelling.
I guess you could instead frame the Revolution and the Civil as battles between rival and competing Aristocracies. Where "the gentry of North America" rebelled against the Crown of England and rallied the commoners to their cause. And the Civil War was (very easily argued) the "Southern Aristocrats" declaring war on the political power of the Northern States, as they saw the loss of their slaves as a likely loss of their personal and economic power.
It could be argued that there are effectively two competing and rival aristocracy equivalents now emerging in the United States, but the lines are very blurred on that front at this time. There is far too much overlap between the camps for a "clean break" and
war to take place.
More likely would probably be a prolonged period of extreme civil unrest which will happen whenever one side is strongly "out of favor" with the current party in power.
We had the Bundy family activities under Obama, and we now have Anti-Fa and BLM acting up under Trump. So long as both sides are playing to their respective activist bases, this cycle is only going to continue to increase in intensity. Trump has certainly turned the dial up to 11 in many ways, although I'm not sure what base he's playing to at this point.