It may be true at present but if RW hangs on for another ten years (completely feasible, given modern medicine) who knows what the landscape will be like then. Kelly will be about 60, Pegula may have lost some of his fortune, etc. etc.
And in any event I believe RW when he says, quite simply, the team will be sold to the highest bidder when he passes. Full stop. He has made no moves to get a minority stake owner in there like Kelly, which would bode well for the idea.
I think he is a cheap old bastard likely from a family of cheap old bastards and whose progeny are by now also cheap old bitches, so the team will be sold to the highest bidder when he is gone. And that bidder has likely not even emerged from the woodwork yet.