There are only three possibilities for what you could be talking about:
Third-party candidates (not viable)
The Democrats picking somebody other than Biden Harris (not likely this late in the game, especially a second time)
Something entirely irrelevant to the election at hand.
You say you’re taking about #3, which already isn’t great due to the whole “being irrelevant” thing, but what’s worse is that you’re bringing it up as if it’s a rebuttal to the “our only choice” people when the “our only choice” people are clearly talking about #1 or #2!