"Joe Biden’s most effective campaign strategy has been to lie low and let people vote for whatever imagined version of Joe Biden congealed inside their heads."

"On Friday, he went on MSNBC’s Morning Joe to discuss the Tara Reade allegations. It was not a good argument for changing this strategy.... In the face of mounting evidence that Reade’s allegations are more than the baseless smear his campaign has dismissed them to be, Biden has mostly faded into the background, while his surrogates, supporters, and some pundits went to bat for him, deploying timeworn canards about sexual assault victims and what circumstances justify disbelieving them, or dismissing Reade outright before a fuller picture sees daylight.... [C]olumnists from the New York Times to the Nation stepped up to discredit her, and politicos from Stacey Abrams to Nancy Pelosi reaffirmed their support of the vice-president. Even Kirsten Gillibrand, who drew ire from within the Democratic Party when she pushed for Al Franken to resign after evidence of his misconduct surfaced in 2017, doubled down on her support.... [Biden is] largely staying true to the strategy that’s guided his campaign since early on, which holds that the winningest Biden is one to be imagined, not seen, heard, or even thought about too hard. His staff recognizes that the less its candidate speaks, the less opportunity his supporters have to neglect evidence that undermines their faith — in his competence, his election odds, and, increasingly, his innocence. If there’s one thing for which the Democrats have yet to punish Biden this cycle, it’s his silence in the face of lingering doubt. To change that now would be to change the very foundation of his campaign’s success."

From "Tara Reade Is Making It Harder to Hide Joe Biden" by Zak Cheney-Rice (in NY Magazine).

I don't think Cheney-Rice mentions the coronavirus lockdown that's helping Biden hide. Biden doesn't have the option to come out of hiding by doing events surrounded by supporters who make him seem comfortingly normal. He can only do that face-in-the-camera sort of appearance from his basement, and he's not that great at that — and, in fact, no political candidate is good at campaigning like that.