Clearwater just chose to close for 2 weeks; the other Pinellas beaches are not.
https://www.tampabay.com/news/health/2020/03/18/clearwater-beach-to-close-to-the-public/
(The argument is that tourists are already there, and if they drive them off the beaches where there is a fair amount of space -- Clearwater being the exception -- that they will just congregate elsewhere. Not sure it's valid, but at least they do state a reason.)
I spend a lot of time on Pinellas beaches. Clearwater is by far the one with the most crowded conditions and nearby "other" things to do; most of them are a lot more primitive and almost never actually get crowded the way that beaches in the Northeast and around Miami do. There have been plenty of occasions in places like Treasure when, even on a summer weekend, I've been there when the distance between umbrellas was at least about 60 feet, and often way more. I'm not saying it's harmless, but in some places/situations, it is perhaps not quite as catastrophically irresponsible as some folks have been envisioning.