Well, that's a clever but fairly slippery reply. You say that forum comments and what I'll call formal reviews (print reviews) are no different, but then you go on to talk about equality of people comments. Then you note that print reviews and forum comments (I'll leave out dealer remarks because that was not in my question.) can be as interesting or as entertaining or as informative, etc. as one another. That is to say you have a reaction to or opinion about what you read; though having a reaction or opinion for each is not grounds of equivalence.
While just about anybody who knows a little HTML and buys some Web hosting service can call himself a reviewer, there are some differences between formal reviews and forum comments. There are requirements and structure in formal reviews that do not obtain in forum comments. Perhaps such differences don't make a difference for you, but they still exist.
Formal component reviews go through a vetting process apart from the author before they get published. Forum comments do not. Formal reviews are fact-checked by manufacturers for technical accuracy prior to publication. Formal reviews are edited for grammar, spelling, concision, readability, comprehension, rambling, etc. before publication. Forum comments don't get edited or evaluated by a third party. Formal review authors have hands-on experience with the product covered in the review and follow certain protocols and processes while reviewing a product.
Formal reviews can be and often are less overt in their conclusions, especially if they are negative than forum comments; few reviews will say 'this product is not very good', at least not in such terms, though they may say so in other ways. Forum comments can say pretty much anything with or without explanation. Forum comments are usually written in a few minutes while formal reviews are written over days, weeks or longer. Formal reviews generally have a structure to them and must include certain pieces of information. Almost all formal reviews include product cost, manufacturer's contact information, system review context, sonic description and usually information about how the product is designed and constructed. Forum comments have no content requirements and can say whatever they want.
Formal review authors have hands-on experience with products under review typically for several months, sometimes longer - in their own systems, where operating contexts are well understood. I know you said to me that you can make jugement about a product in a very short time and don't need weeks to form an understanding; a formal review substantially reduces the liklihood of snap decisions - you may disagree but there is value in having the perspective of someone who has spent time with a component in a constant environment. Formal reviews are not based on what was heard at a show or a friend's house or some dealer's showroom for a day or two. Many, though not all, formal review authors have acquired years of review experience - it is pretty straightforward to identify those who do. Maybe some forum comments have some of these characteristics, maybe not.
This is not putting put down forum comments, their entertainment value nor their practical value (some quite valuable), nor forum participants (heaven forfend), but there are differences between forum comments and formal reviews. Imo, that's a good thing.