"But, I have things to do"
One person with COVID-19 who is not restricting social contact gives the disease, on average, to 3 people. After 10 cycles of incubation, perhaps a month, that results in 59,000 sick people.
COVID-19 seems to have about 1% mortality so almost 600 people will die, or not, depending on whether that one person, who may not be showing symptoms, stays in or goes out.
You may not be the one person at the start of this chain but you could very well be one of the 59,000. Or the 600.