U.S. mortality rate is 2.29%. Average daily cases for the past week have been hovering around 140k (https://covidtracking.com/data/charts/us-daily-positive).
140,000 * 0.0229 = 3,206 deaths per day. 9/11 was just 2,977 deaths (https://www.google.com/search?q=9%2F11+deaths)
So once the cases from the last few days progress further, we will have 3206/2977 = 1.07692307692 9/11s a day in deaths.
note: corrected above, should have said 3k not 9-10k. Misremembered my calculations from earlier this week. Analogy still accurate
This also comes down to enforcement. Even if a federal mandate were somehow passed, if the people's hearts aren't in it in red areas, cops won't enforce it in those areas and it will be a joke. It really is 100% about public opinion.
To your point though, I'm pretty extreme left, and I don't think we are going to have an easy time containing it by any means. It is going to continue to rise months and possibly years into a Biden administration, but I think we'll still have a lot less deaths. No one on the left thinks this is magically going away, even with a vaccine. Distribution and production of a vaccine is incredibly difficult logistically, and these things need to be refrigerated. So at best we're looking at like a year from now we all get a vaccine imo.