In many ways the real peer review comes after publication, when more people have seen the work, and can react to it. In some fields it is not terribly rare for

In many ways the real peer review comes after publication, when more people have seen the work, and can react to it. In some fields it is not terribly rare for flaws in the work get discovered at that point, and rebuttals get written and circulated (or possibly even published in the journal.) The prepublication peer review is not always a terribly high bar to pass. It does help to weed out some of the crap, but lots still get published, especially in less competitive journals.