This is a bit of a philosophical question so I’m going to try to give you an answer and I apologize if it’s going to be unsatisfactory 😂
If you’re aiming for a high quantitative score, you’re guaranteed to face a question on the test that you have never solved before in your life. You’ll get a hard question that will stump you because you’ve never ran into that type of pattern or question type. Is a hard and rare questions reserved only for the high scoring candidates so the official guide and other questions kind of help you to prepare for it but it’s really the material that you’re studying and the knowledge which will help you more to solve this unusual question.
What question practice can help you quite a bit with is eradicating careless mistakes, solving questions quickly and efficiently and managing your time. Because it is impossible to prepare for this question you’ve never seen before, having strong fundamentals is more important than crunching thousands of questions. Having also been in a situation where you are stumped and have no clue how to solve something is also helpful because that gives you experience how to dig yourself out of a hole while under stress.