Maybe I'm just being too optimistic, but I think that would break reality for normies if they keep dragging it on without any type of messaging about it. If they say "sadly, Biden is gravely ill with Covid, we've got him on a ventilator" or something similar for a bit then being out of sight and eventually passing becomes sad, and explains not being around. But a couple weeks, to say nothing of a couple months, of "oh, the president is fine, just staying out of public view" followed suddenly by "unfortunately he died" has to start lots of people asking questions.