There are many other issues as well. Modenr Governments have many levels, and how your voting power plays out on various levels is hugely complicated and matte

There are many other issues as well. Modenr Governments have many levels, and how your voting power plays out on various levels is hugely complicated and matters. Geography is clearly still important. Voting with all other butchers of the nations about what kind of public transport system should exists is of course dumb. But in some sense, by extension voting geographically for a person in your district to discuss if going to war with X nations or how abortion should be handled makes less sense. Also if you vote geographically for somebody that then decides over the whole nation can lead to the effect of the national will being manipulated to improve individual districts to gain voting power. The president in the US is really the only person who represents the nation, everybody else is primarily interested in their district or state. In Switzerland we don't vote for any person on federal level, only specific issues. And that is even before you get to the question of how power, taxation and so on should be distributed over all these levels. That a whole other can of worms. Democracy is really whole can of worms.