It’s nonsensical, but also objectively far more extreme than even some kind of aptitude test and would result in less freedom.
Elections are a substitute for violent revolution. The threshold commitment for voting being far lower than “willing to risk death or commit murder” makes governments more accountable because the citizens’ risk side of the risk/reward matrix is lower so change is more appealing.
Inversely, raising the threshold for change by putting more restrictions on voting makes governments less responsive to demands of the populace, and/or completely unresponsive to the preferences of the disenfranchised.
For example, look at the very people mentioned, earlier: the “dreamers.” They have no path to vote and the only incentive the government has to respond to their issues is the extent to which voters care about them. Despite the fact that it’s a fairly popular issue, the support is insufficient because it isn’t an important enough issue to motivate voters who aren’t directly affected. Look at the history of black people in America, citizens of Russia, Iran, Syria, etc. etc. The disenfranchised have less liberty in almost every context until they rise up and force the government to give them the vote.
So if the very idea of Democratic systems is to not have to risk death to change government policy, requiring military service and
some risk of death just to achieve the tool of nonviolent revolution is nonsensical.