The inevitable process of science involves raising questions that, at first, do not have answers. Publications are not exam papers where peer reviewers have the answer key. The process of science is also a communal activity, where one scientist raises a question in one forum, and the answer comes from a different scientist years later. Peer review should not and does not (per your own admission) suppress the raising of unanswered questions. And this contradicts your earlier claim that asking questions isn't welcome.