Peer review is of utmost importance. Any researcher can make mistakes. I can read papers and apply them, but I need expert opinion to trust the papers. I am not skilled enough in any but my specialties.
I do see papers with outlandish claims and very weak support. This kind of excessively bold statement I see in many papers is a red flag for me.
Its easier to tear down than build up. Resilient structures are tested structures and last the longest.