Here's a dose of political reality for you.
If there were three faceless presidential candidates, one far-left, one far-right, and one bright purple moderate, the far-left one would get 40% of the vote, the far-right one would get 40% of the vote, and the other 20% of the populous would be undecided.
Tell me what billionaire is going to throw $1 billion of their own money into that fight