Actually, I think this comment indicates that you agree with the subject title.
No, if I agreed completely with you then I wouldn't bother reading reviews at all. And I do read reviews.
I merely use reviews as one source of information, and I weigh it accordingly based on the biases of the reviewer and the track record of the publication. The problem I have with most equipment reviews in audiophile publications is that the manufacturers have the magazines over a barrel because the publisher depends on advertising revenue and review samples from them to keep the presses rolling. So rags like Stereophile and The Absolute Sound are far from independent. That is why most reviews of gear are positive, because the publisher doesn't want to risk any backlash from advertisers. With that said, some reviewers do seem to make some extra effort to write meaningful reviews despite the apparent conflict of interest that their publisher might have between their subscribers and the equipment manufacturers.
You have to apply the same logic when reading owner comments. How many times have you read the phrase "it just blows away...whatever" on this and other forums? I am fairly certain you don't take that as the gospel truth and make buying decisions based on owner hyperbole.
Where I agree with you is that buying based merely on reviews, be they professional or owner written, is risky.
Good and bad are a matter of subjective opinion, and that is the rub. You are trying to treat them as absolutes, and in that respect revews are bound to disappoint you.
Also, keep in mind that truly crappy gear usually won't get reviewed because its pedigree is so low that it is not on the radar of most audiophiles, and the rags generally believe that it therefore is not of particular interest to their readers.
--Jerome