Don't be ridiculous. That 10-12 hours a day would also include the same periodic trips to the store. Or are you suggesting that people will stop needing supplies when they go back to work? And you're seriously suggesting that offices have "maybe 2 others"? What office would that be? Name me a few common examples where people come into contact with only 2-3 others as a part of their daily job.
We're nowhere near a vaccine. We're going to need a lot more bought time for that to be a factor.
Despite the appearance of things being for shit, it's actually still better than it was in normal daily life. And if and when the virus gains more traction because a portion of the population is being stupid, then people will change their tune again. People as a whole tend to have a short attention span, but it will be hard to argue with the death statistics once the virus is hitting certain areas harder than others.