You are being overly obtuse. The term popular vote has a clear definition in US presidential politics and the meaning of “won” the popular vote has a clearly defined meaning. That this has no bearing on the outcome of the election is a separate issue but doesn’t diminish in the slightest the meaning of winning the popular vote.
The term may have a clear definition, but the value doesn't mean anything.
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.
