Some recent polls put florida at only trump+2 or trump+3 . There's a rather realistic case where polling error underestimating dems by 2% or more could make it a tight race
Polling errors over estimating republican by that much have happened in the past. In 2012, republicans were overestimated for president by on average by 2.5%
They import them faster than they die, even with Covid.
The main thing though is that anyone who says they know how Florida is going to turn out, is lying. No one knows, so the best strategy is to let Trump fail rather than put effort into beating him there. He's already pissed off the Haitians and women, goad him into pissing off the Cubans and let the chips fall where they may.