People can do a lot of things. It's not a big deal that measures won't be perfectly effective - in the presence of any suppression measures, once the case count stabilizes, there's a lot of room between "literally impossible to spread the virus" and exponential growth.
That's nice, but one such person can shut down the entire production line in some factory, or the hospital department. (happened already in my country) Such people have disproportionate effect on the economy.
