I agree with the overall call to action: there is no alternative to Biden. We have four years of experience with each guy, and we know the one who isn't Biden is far, far worse. However, this can be a difficult thing to talk about when it comes to any specific issue, because, depending on who you are, this or that issue isn't merely a side quest; it's the actual core thing. If Biden has let you down on your core concern, there's grief there, and there are needs unmet, and that's an understandable barrier to supporting him. And yet, and yet—the other guy is worse. That's what it keeps coming back to, and what it comes down to.