Because the masses arent infected everywhere. It slows spread.
Wfla: (Mar 7) Gov. DeSantis directs state to activate Level II response to COVID-19 ...DeSantis is expected to hold a news conference at 3 p.m. Saturday.
https://www.wfla.com/news/florida/gov-desantis-directs-state-to-activate-level-ii-response-to-covid-19/