Well, Romney isn't president now. Trump is, and he only won the district by 1. But you are right, this seat is more about the narrative anyway. My point was that I seriously doubt that many Democrats will be happy if Ossoff loses only by 1 or 2 instead of 10. They have set their expectations so high that anything other than a win would be a disappointment IMO.
However, isn't it significant if Ossoff finishes with 49% of the vote or something, and implies a sea shift in the college educated electorate?
Then it just means we are holding steady at '16 levels in terms of the demographic change of college-educated whites; but we don't need that special election to confirm that; we already see this pattern in cross tabs for public opinion polls.