Suppose that a global flood DID occur. What would that mean for science? At present, science discounts the idea, so if there really was a flood, then it would suggest that there are HUGE amounts of scientific theories and assumptions which are wrong.
Science doesn't discount the idea because of systematic bias and assumption. Study the history of geology and you'll see that it was people trying to prove the reality of a global flood that eventually gave up on it, because the evidence did not fit the theory. If there were a global flood, we could readily predict what traces it would leave. For example, we would expect to see all creatures present in the same stratigraphic layer- we don't see this anywhere. We would expect to see, flood charactersitc sedimentary deposits, spread over the world and dating to the same age. Again, no such deposits. We can keep playing this game too, adding up a mountain of evidence contradicting the idea of a global flood, evidence coming diverse streams- geologcy, genetics, archaeology, etc, etc.
For this reason, some scientists choose to ignore new theories which would seem to threaten their established world view, or else dismiss them very quickly.
New theories emerge all the time. There are always younger scientists who need to make a reputation after all. Never mind general competitiveness. In any event you assertion is ultimately wrong. New ideas wil encounter resistance, and will be tested- but the truth will out. Read the history of science and you'll encounter names like Planck, Einstein, DeBroglie, Wegner, Margulis, etc. All of these people were instrumental in overturning the prevailing orthodoxies in their fields, and they did it based on the data. Although in Wegner's case vindication occured well after his death, mainly the result of the oceanagraphic surveys conducted by the US in the 1960's.
Edit: having a brief look at the site, I am not impressed. Take a look at his treatment of geomagnetic field reversals; it's flat out wrong owing to mainly to his inability to differentiate between scalar and vector quantities. You might want to look at Fowler's The Solid Earth or "Electromagnetics with Applications" by Kraus and Fleisch for more detail. Both of these are textbooks that I have used in the past by the way. Such elemtary errors on his part do not incline me in his favour.