One more thing I forgot to mention about water in vapour form vs. water in liquid form. If you were to take 1 gallon of water in liquid form, the same amount of water in vapour form is 1600X greater in volume than the same amount of water when it's in liquid form.
For an entire Planet to be totally covered by water in what was a canopy???? All that water covering an entire planet would have to be 1600X larger in size by volume as a canopy.
All it takes is critical thinking sometimes.