I strongly disagree about Trump. That's basically been Trump's exact MO since forever; any real story concerning him just gets instantly dismissed. "It's locker room talk", "it's fake news", etc. Trump and his White House have held far fewer press conferences than past presidents. And at his press conferences, he refuses many questions and dismisses others with either non-answers or just his typical bullshit salesman-speak.
I do think this is probably the "Trumpiest" Biden has acted so far, but I think I'd probably do the same thing if I were in his position, honestly. At least until the election is over. It's politics. He doesn't want to throw too much gasoline on the fire. It's just the media's and Twitter's behavior that I just mind-boggling and gross, and the irrational way so much of the left is treating it.