If the PM's Council was using Risk Management tools when making these decisions (and one would assume they were), Pattaya, with only 5 hospitals, would end up being a much higher risk factor than Bangkok with it's 50 hospitals. Maybe this had something to do with their decision.
They already know that there's going to be an increase in covid numbers when tourists start arriving, but what has to be keeping them up at night is having the medical capacity to handle the increase.