I mean the data is all there for you to look at and experts who have looked at it have agreed it is minimally biased. If you want something that is unbiased, then you’re out of luck, every human has bias. If you believe all experts are biased, you’re also right, but they’re way less biased than someone being paid to be biased. So like everything, you can’t wait forever for perfection, and anyone who tells you they are perfect and totally unbiased is likely the most biased, anyway.