While this may sound like a duplicate to this question: Is there a way to improve the quality of edit reviewing? the answer to that question did not reply to the fundamental problem. Nor did I find another appropriate answer.
A short situation description: I am working on an electric problem I have in my household. I found a relevant problem solved here: How to throttle power consumption of a heating coil? While calculating my numbers according to the solution provided in the answer, I found out, that the answer is missing some brackets, that are fundamental to the correct solution.
I had no reputation on that Stack Exchange site, so I could not comment on that problem. While people suggest to quickly get 50 reputation points and then comment on the post, I am not a professional in electronics nor do I plan to become one. So I am not going to gather 50 rep points to correct the error. Still I would like to save other users from spending time looking for the error in the calculation. So I posted an edit. The edit got rejected, as the person stated that adding the brackets changes the result and the formula itself. Yes, the brackets changed the formula, to the correct one.
I think a reviewer should pay more attention to the edit. Here it seems that a quick reject is the easiest way. I posted the edit once more and then it got accepted as it was correct for obvious reasons.
I wonder how many errors are there on the many Stack Exchange sites, which someone tried to correct, got rejected and left it the way it is. Does someone who wrongly rejects an edit get some reputation reduction? I think he should, so he would be encouraged to make quality reviews.