As a former FL local, because most Floridians DO NOT go to theme parks in August when they have the option of going during any other time of the year - it's a weather thing.

My FL friends equate doing inside activities July thru Sept the way we Northerners do indoor activities Dec thru Feb - to avoid hanging outside in the most extreme weather for the area.
They do come out more often for special events, though, so FSF might be a draw for some once the blackout is lifted. Hoping not to the point of insanity, we'll see - we'll be there!