> That makes zero sense. Jill has no chance at all to win, Biden does
What in the world does that have to do with what you asked... You asked for a solution. The solution is everyone votes for a third party like Stein. **obviously** if everyone votes for her she has a 100% chance of winning. So your point is simply incorrect.
what it sounds like you meant is "what is a solution that involves absolutely no one doing anything different other than you", in which case youd be right, voting for Biden, or Jill, or anyone else wont change anything, because there is no solution that you as an individual can execute.