I think if you get easier questions, you will need a high score.
Also, i think there is weightage for different question.
Just my guess from the results, the exam outline phrasing, and also non scoring questions. I suspect PMI can easily do some software or data analysis which is why they hide the scores now.
Like this question, which 90% of eventual PMP get it right, means it is a straight forward answer, that is like 1 point.
If there are 2 correct answers, only 50% of eventual PMP get it right, maybe 1 answer will be worth more.