Did they hide his health sure, but when the debate happened we all saw how far along he was and what happened? The Dems immediately called to replace him on the ticket, it took awhile to convince HIM to step aside but he did.
COntrast that with Trump who's not only in major cognitive decline but tried to VIOLENTLY steal an election, stole documents, and attempted to conceal both crimes by bribing and coercing people not to testify against him.
And the people blasting CNN etc over Biden VOTED for Trump.
And a reminder, Donald Trump was unconscious for more than 2 hours when he had Covid, in the hospital, with severely impacting breathing function on a experimental drug cocktail including major steroids. By law they should have invoked the 25th right then and had Pence take over as POTUS until Trump regained consciousness. Why didn't they? BEcause they were all afraid of Trump