Also, it seems many recommend equipment they do not own or ever heard.
Truth rides on the credit system, William James said. That means that most of what we pass along are claims we have not verified ourselves. Why would audio be different?
Why do we pass along claims we, ourselves, have not verified, experimentally? Because we have to get along without this kind of "hard" proof (which is typically not that hard, anyway), and we do so by making judgements about language and speakers. And it works, a lot of the time. And the alternative would be to remain silent, or caveat things to death.
That's the wisdom I see in @baylinor's comment, "read MULTIPLE replies on forums and product reviews." It's not perfect, but it makes a good judgment more probable.