We wish, but then the Democrats and Republicans wouldnt be able to have a stranglehold on politics. A third party is dangerous to the establishment, and thus will never be implemented.
As for OP's question, the answer has already been said: it adds more hoops to jump through for people who are not determined (or have the financial means) to vote. Whether or not the less-interested should be allowed to vote is out of the question, a fundamental right of this society is a right to vote and that should not be impeded by anything. If they elect a bad leader, then they deserve a bad leader.
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