You keep chewing on that bone, a DNC talking point, as if it has meat on it.
But the public will welcome Vance in the worst case. W/ Biden, now, it was necessary to conceal and cover up his frailty and cognitive decline because the alternative would be Harris, whom nobody liked or wanted. Reading the fake news, then, you weren't even aware of it. At game over, those Harris fears proved justified.
I'd note that Trump's physician gave him an all clear and his stamina on the campaign was extraordinary, much better than Kamala's. And he's off to an energetic start to appointing his Cabinet and staff. Guess you gon' have to suck that up. You'll have plenty to rant about when Trump takes office and starts making the kinds of changes he was elected to do.