I think a lot of people don't see it that way. E.g. there are many working class people across America who support Trump.
Maybe they could vote for the Democrats if the Democrats can earn more blue-collar credentials, and if they can paint the Republicans as the party of the rich. Perhaps the GOP is the party of the rich, but they now also have supporters who aren't rich at all.
On [email protected] they've been suggesting that Harris went too far to the right to try to capture moderate Republicans, and that's why she lost, but yes I think this OP image makes sense.
Arguably though you could say it's not as simple as left/right. Maybe the Democrats should look at which specific demographics they did badly with, and then figure out how to better appeal to those demographics.