Is that really a problem? There's nothing stopping anyone from pointing a gun at my head and demanding I transfer all my savings to their account. That would have more impact on my personal wellbeing than someone stealing my vote. But we don't ban internet banking.
If somebody steals your savings, one person is affected - you. And while pointing a gun to one person's head will work, it won't scale.
But if somebody works out how to steal an electronic vote, such a solution is likely to scale, and to compromise the outcome of the election, which would have a massive collective impact.
