Right, and your response with:
Jill has no chance at all to win
Makes no sense. If my solution is that everyone votes for her the chance of her winning is 100%, the opposite of no chance.
If the solution i proposed be that I vote for her and no one else does anything different then her chance of winning as a result of my vote is effectively 0, the same as the chance of Biden winning as the result of my vote. So your point is equally moot.