Only when it is able to demonstrate its conclusions. It (science) has not been able to demonstrate evolution, hence, the debate.
Seriously, if you were correct, there would not be so much controversy. The fact is that even experts are merely "guessing."
In a very loose sense of the word, every scientific theory is a "guess." But a well-informed guess, which is something very far from a wild shot in the dark. Scientific theories are designed to be explanatory models for the data they purport to explain. Any scientific theory must be testable. It should make predictions. (Neither of these applies to creationism.) If a scientific theory fails to survive such a test, it will be revised, or even disgarged. As long as a theory continues to provide a useful explanatory model, consistent with the data, it will be regarded as a good scientific theory.
You may find these articles helpful. The first is short. The second is much longer, but loaded with information on this issue:
Is Evolution Science?.
29 Evidences: The Scientific Case for Common Descent.