Haha of course not. I wish so called "professional" reviewers would change scores if they thought something was done improperly. The most important thing about a review is to inform the consumer about the product as accurately as possible. If that's not being done then it needs to be fixed to make sure the right message is being sent out.
I really do think that people who think others lose credibility because they are willing to admit they are wrong need a reality check. Those who are willing to admit they are wrong and didn't get it right the first time and willing to change for the sake of being more accurate are people who should be held to the highest respect. Maybe if politicians in my country could do something like that we'd live in a better world. Maybe if people in general could do it haha.