There are No riots in Italy. Only deaths due to this epidemic.
To bring things down tot the local level… You might not get sick, but you might be the one that further spreads this virus, and the one you infect will do the same to others. In Europe there are whole towns infected due to only one careless individual that joined a family event - maybe even unknowingly. Still, like the chain of domino’s falling in aircraft accident sequences of events, a phenomenon you might be familiar with, the shelter in place advice will help stop one piece falling over and might just be the essential stop in the sequence of events. It is not a matter of what the Constitution says… it is a matter of social responsibility. If this virus gets further out of control even your most basic health care services, for you or your family or friends, will not be able to cope.