Peer review is important for checking the correctness of the results, among other things. It's not uncommon to find big errors; small mistakes are everywhere.

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.

Questioning the importance of peer review seems like rage bait.