The obvious value of this is in avoiding recipes that are bad, of course. If everyone down there is saying, "Hey you, beware, this does not work," you can save yourself a lot of heartache by heeding them.
Here, we are considering recipes that home cooks generally like, but in which they see some minor flaw or opportunity for improvement - say, a swap of one ingredient for another, an adjustment on the oven time or temperature, etc.
But the beauty of the comments is that you're usually looking for edits that multiple people have suggested; indeed, the best is when you see that someone has tried someone else's tweak and reported back approvingly.
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