While true, that doesnt take into account the plentiful of people that were theoretically killing and infecting guests at Disney well before Florida was in the state they’re currently in.
You might decide on a secluded trip over Disney, but not everyone is going to choose that route. Some will go to a beach, or some will find another theme park, or some will go down to Florida regardless and go to Universal or a SeaWorld, or Busch Gardens and it sure doesn’t look like any of them are planning on closing.
Sure, there might be a correlation of cases coming from the non-Disney parks down there, but none of them are sitting under a virus free bubble. All of them were to be expected to have people get sick. None of these parks are opening under the assumption that no one will contract the virus. But a place like Universal, or even Disney are opening, or planning to open in such a way that will be as safe as they possibly can be