The problem is that most Republicans (and, it should be said, a good number of Democrats) really don't believe in democracy at all.
This, unfortunately, is basically true. USians generally have forgotten the basic tenets that make democratic government work. That is, the democracy is the
decision making process. Once the decision is democratically made
all participants are obligated to make it work as best they can, even if they are in the minority that voted otherwise.
They are perfectly fine with making voting as difficult as possible. And they explicitly reject the idea of a political system organized along the lines of one person, one vote.
This, however, is currently incorrect for the wrong reasons. Right now, even though most Democrats are not the least bit committed to the principle, they are in favor of, even demanding of, making voting easier
because everyone knows that it would favor them.
Anyway, so far as the upcoming election, the pandemic chaos, and the supreme court goes...yes, states are going to have to adapt their election processes, and GOP dominated states are going to do that badly. However, the seriously GOP dominated states were already doing badly anyway, in that they were likely to continue being GOP dominated. So there's minimal loss there. The benefit is that
the issue of the electoral process itself will be brought front and center, in a way that carries inescapable consequence. "Ha ha,
we used disenfranchisement to pwn the libs!" is a lot less cheerful statement when it ends with "We stood in line and a lot of us died while those blue staters just mailed in their ballots." When those people in Tennessee are asking "Hey, why didn't we just mail in ballots? My brother-in-law, Uncle Henry, caught flu and died working at the polling place," they are not gonna want to hear "well, that's part of pwning the libs, you see, just a price you have to pay to keep me in office," as an answer.
Meanwhile, in the purple states (many of which have GOP in power at the state level) there will be a hail mary effect. The state government will be forced to say "yes, we are going to kill a lot of you, but that's the only way we stay in power here." If that doesn't drive turnout to flip the state
no matter what then it really is too late, but I think that in most places it would.