Incorrect. A theory is "An entire body of knowledge associated with a particular area of study, including the basic postulates, predictions based on these postulates, observations and experimental data, and their interpretation. [Cal Poly Physics Colloquium, 9/23/99]Theories are well described, repeatedly observed, and verified statements. When they have repeatedly confirmed over a long period of time, the theory for all practical purposes is used as true or fact, (sometime referred to as superb theory such as quantum mechanics).
Theory does not imply uncertainty or opinion - not in science.
Where'd it come from. I'm aware of the goofy ice age theories
This is the first time I've seen the phrase "goofy ice age theories." There's a considerable amount of evidence for the ice ages and their affects.
If you're looking for the ultimate 'where did the water come from' answers, I guess you'll have to start with matter clouds and planetary formation. As planetesimals formed, the atoms and molecules clumped together to form larger molecules of all kinds, including water.
Outside of that, I don't know what to say except cut back on the Hoagland readings.