Pretending there was a popular vote when there wasn't is like claiming whichever team scored the most points during a series of games won the series dispite the fact that the series is decided based on which team won the most individual games (although some tournaments do include total points scored as a tiebreaker).
Without arguing if it's a good or a bad thing, we do not have a popular vote, and summing the votes of the individual contests is not a meaningful estimation of what the results would be if we did. If someone wants to take the time to make a nuanced estimate, with consideration of how turnout might change and what results we might see, that would make for an interesting discussion, and I'm sure we'd all have fun arguing over the details of the assumptions and the results.
The fact that the popular vote is ignored because of how the system is designed is the entire point.
