2020 proved that waiting until Election Day to vote as a way to foil fraud doesn't work.
They just shut down ballot counting at 3:00 a.m. and send the GOP watchers home, so they can manufacture the necessary ballots when nobody is watching.
Democrats only get a huge advantage when they can drum up a race war. They had that in spades with BLM and George Floyd and the race haters on TV on CNN, MSNBC and Gayle King on CBS. When they aren't inciting race issues it's more difficult for Dems. You see, once the Dems don't get increased Black turnout and at the 90+% block vote they are in big trouble.