We shouldn't.
Look, I don't think there's any question that polling has moved slightly in Trump's direction in some of the swing states over the last few days, and that the Trump campaign has gotten off their back foot, and are driving the discourse in many places. That's to be expected and there's no need to sweat that. Harris has superior field organization in every swing state and at least equal enthusiasm, not to mention more positive (as opposed to negative) enthusiasm, and she can get it back with solid campaigning.
But the fact is that this is an extremely tight race in the places that matter and right now there's 5-7% of potential wiggle in any given one of those places and we should expect it to show up that way in polling.
I still maintain that that 5-7% who will decide this election, they will lock in as a group, as soon as the week following the debate and by the end of September at the latest, and they will harden from that point absent some kind of major exogenous event*. The debate could not be more important and will quite possibly decide the future of the Republic, not just the outcome of the election. So there's no use in talking about what would happen if the election were held today, because it isn't.
* The Harris campaign and the DOJ should both be extremely vigilant about adversary state actors on this point. Surely someone is planning something.