You can tell how much of this is stagecraft requiring the suspension of disbelief. President Biden would have us believe things that are logically incompatible, e.g., (1) that climate change is one of the most important crises facing the human race, and (2) that John Kerry should be entrusted with leading our response to climate change.
John Kerry should not be in charge of climate change — he should be in charge of addressing the national debt, because the only thing in life he ever has had much talent for is marrying money. (Mr. Kerry has married two heiresses; the current Mrs. Kerry has married two senators — these are totally normal people and not weird at all.)
Not off the Democratic bench, no. A first-stringer.