Let's take a step back:
The only criticism I leveled above is the notion that RFK's statements, in that clip you linked, are anything other than pseudoscientific dezinformatsiya straight from the Kremlin. I leveled this criticism on the idea that ethnically-targeted bio-weapons are nonsense. And I say this personally knowing people whose entire job it was to evaluate hostile foreign bio-weapons for USAMRIID.
All the rest of your tag cloud here is about other stuff. It is answers to questions I didn't raise. it is attitudes about subjects I haven't brought up.
I will say this: it is my measured and informed opinion that RFK Jr is the very definition of a useful idiot.. And I will say this: RFK Jr. does not share your ideals. The Kennedys are a transactional family, none more transactional than RFK Jr. He spent what, 15 years as in environmental law? Why isn't he running on the environment? Think about it for a minute. How hard would GenZ lean into a candidate who said "I am a single-issue candidate and my issue is climate change"? But that's not where he's getting his attention from. Because it's not the attention he wants.
Biden will absolutely debate. He will debate any opponents, Republican or otherwise, under the terms of debate agreed upon by the opposing parties. You know that, I don't need to remind you. It's 2023, man. We're a long, long road from there. And you're giving to RFK Jr. to, I dunno, somehow alter history? Show me the debates here.
Biden has not done a lot of press conferences. He's also been dealing with States of the Union where this is the standard level of decorum:
All that to say, "I don't like biden because he doesn't do a lot of press conferences" is telegraphing pretty loud that you don't like Biden for _________________________ (whatever reason is convenient in the moment). I'm not going to tell you to like Biden.
But I am going to tell you that you're too clever to take on RFK Jr's baggage just because you think Biden is old.