I don't believe those people matter politically. Every election there's a lot of rhetoric about "undecided voters" but in practice the campaigns don't care about those people. I know undecided voters isn't exactly what you're talking about, but I think the concept applies.
The real effort is in getting your historic/likely supporters to show up rather than stay home. If someone is a big Biden supporter, there's almost nothing you can say that will get them to vote Trump. And vice versa. So your hope is to get your likely Biden supporter angry/scared/whatever enough to get off their butt and vote. That's what these things are about. That's why Trump says crazy flamboyant things. It's why Twitter never fact checks things like the gender pay gap, perhaps the most debunked concept in all of economics.
For me, seeing the world through this lens results in a lot more things making sense. It's especially true now that information/news is so siloed. People in power can say basically anything they want as long as it's emotionally aligned with their team. And their team will never know they've been lied to, because they don't watch the other side's rebuttals. For example, Twitter is fact checking Trump on this mail in ballot fraud issue in the same week that there's multiple examples of mail in ballot fraud in the news. But the people who think Twitter is a reasonable source to fact check Trump will never see that, so they will get away with it.