Here's the part of Biden's talk I was referring to: >>46614
This is really in sharp contrast with Trump's behaviour in this other press conference. Maybe it's just how is, but I suspect the staff prepares him with a bunch of lines he can throw in to gain a few seconds of breathing room, and maybe they consciously try to make it different than Trump was. Trump in position of power humiliated that journalist making many people feel for her. On the other hand Biden shows this type of humility makes him the one to feel sympathy for. I can imagine very well as a propaganda tactic.
It's liek when Kennedy was elected previously he had an appearance on the telly with Nixon, and he got the advise from his campaigner advisors to wear X color of shirt because that makes his face lighter on the black and white telly they had at the time, and it gained him percentages. These things matter.