Exactly. Peer review is not central to science. It's is flawed and needs work.
Peer review can pass papers without repeating tests or experiments. However many here think if it passes peer review its set in stone and fact. That's wrong.
Your questions and concerns have already been addressed many times.
Again , , ,
First, Peer review is not central to science. The whole scope of methodological naturalism where research is repeated many times to verify the reproducibility and predictability of every hypothesis, and published research over time forms the foundation of science. Second, peer review is only one step in a longer process of research in any one science field of research. Third peer review does represent a first step in the process of confirming the validity of research. A number of articles on research are turned down on the basis of the peer review process,