True. Unfortunately, may of the "opinions" on hardware are self serving in nature. And many are disguised as being "expert" opinions.
Sad but it is the same (or much worse) with audio magazine reviews. This is why I prefer to buy audio equipment based on the User List rather than a review or a testimonial or even my own often all too short auditioning experiences. Sure I will audition stuff and keep trying to stay informed about the latest gear but the variables are so great that I prefer to just select what people I respect use => what is tried and true and has staying power in the market (measured in decades rather than seasonal product offerings). For example, if it is good enough for Pink Floyd then it'll probably be good enough for my tin ears...
Nevetheless Audiogon is a great way to share technical information and chat about our favorite subject. If you really find Audiogon is just self-serving opinions then why do you post here?