How does this agency determine who can meaningfully participate in the study? Are they going to have the expertise to make that determination for _every_ study that could possibly be conducted?

What is the difference (to a layperson) between cherry-picking participants and rejecting participants because they do not meet your study's criteria?

Who funds this agency?

Do the members of the reviewing agency have their own biases, and might those biases tarnish the reputation of a study that is actually well-conducted? (hint: this already happens in journals)