I don’t think Trump has as much of a lead as you think in Florida. It’s unlikely, especially if potential Biden voters vote third party, but it’s far from impossible. Making people believe it’s impossible is part of the strategy though. Why participate if you’re going to lose anyway, right? It’s not likely Biden wins, but it’s possible and you could actually effect it, unlike the places where Biden is guaranteed a win.

At least consider watching the polls, and if it gets closer consider changing your decision.