A common criticism of empirical studies is that they simply confirm what we already know. Such studies are a waste of time. It is indeed true, that a large number of empirical studies generate results that are utterly expected. There is a good likelihood that your grandmother could predict the results of most experiments.
Intuition is important in life.
But our intuitions can fail us. Even the intuitions of the best informed experts regularly fail. It is not what we don't know that is the principal problem in scholarship. As noted above, we can't test every conceivable hypothesis. In research, our activities are limited by physical, human and financial resources.