Florida and Texas are far enough south that people can make their own vitamin D and don't need to supplement if they spend time outside.
The lockdowns have a 0% success rate in controlling the virus.
Since the lockdown is 100% useless, it only stands to reason that populations in sunnier locations do better as the only factor in play that is adverse to the virus is increased vitamin D.
Florida and Texas are far enough south that people can make their own vitamin D and don't need to supplement if they spend time outside.
The lockdowns have a 0% success rate in controlling the virus.
Since the lockdown is 100% useless, it only stands to reason that populations in sunnier locations do better as the only factor in play that is adverse to the virus is increased vitamin D.