Isn’t it reasonable to want the people who make a decision to know what they’re making a decision about? I want all the informed voters to vote but, by and large, uninformed voters make the outcome arbitrary.
If democracies don't allow idiots to vote, that creates a disenfranchised class that does not accept the government as legitimate. An important role of democracy is to stave off class conflict, arguably just as important or moreso than having a government that serves the people efficiently.
A proper long-term solution is to have governments invest in critical thinking skills and education, but of course, it's a catch-22 situation.
> The greatest thing about a democracy is that every idiot is allowed to vote.
> The worst thing about a democracy is that every idiot is allowed to vote.