There are other explanations. We certainly hope that there is a “hidden Dobbs vote,” and there is reason to believe that, but we don’t know it.
Trump support could also be undercounted by 3, which has also been true in the past.
Also - polling has been off by an average of 2-3pts over the last five presidential elections.
If Harris gets a normal miss in her favor in the swing states (more or less consistent with post Dobbs results), she wins 312-350 EVs, and puts another 20-30
If Trump gets a normal miss in his favor (which has been historically the case) he gets around 300.
And of course if the polls are exactly correct right now she would win 279 EVs, but then it’s a jump ball and there are certification fights.
No matter what happens on Election Day, it’s going to be pretty grim between 11/5 and mid February. But the important thing for Democrats right now is to stop fretting about why Trump support isn’t collapsing and focus on GOTV. He’s more likely to be behind than ahead right now and I’d rather be in our shoes than theirs.