I think these are the two most intellectual, and intellectually honest candidates in recent memory.  If somehow they got their party's nomination (extremely unlikely) a debate between them would be like the Lincoln Douglas debates of history past.

this one wins a prize. RFK, jr. is a certifiable lunatic.
So is Fester.

And who would watch or even care about this?

I said it would be intellectually honest. I didn't say morons would find it entertaining.
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You don't have to agree with someone to recognize they are intellectually honest.  
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RFKjr would, if elected, nominate far left Supreme Court justices.  He would be a disaster for originalists on the court.  I wouldn't want him to win against a more conservative candidate.  But he would be preferred to the deep staters who are totally corrupt and self-serving -- aka the Biden family corruption.  Even Mitt Romney's family was grifting off Ukraine.  The whole DC society, Dem and Rep are corrupt to the core.