For example, I got a Garmin sports watch recently, and one of the reviews I found was from DC Rainmaker, who is exactly the sort of detail-oriented obsessive I love reading reviews from. That got me to read some of his other reviews and I discovered that there's now a whole category of bike radar units that let you know when somebody is overtaking you. That's amazing! When I return to cycling, I will absolutely buy one.
Does that mean I have to be in favor of all blogs? Or that my life will be worse if that blogger stops reviewing? Definitely not. I could have learned about this product in many other ways. Bike stores! Bike forums! The manufacturer's website! Other cyclists! Review sites! Bike magazines! Etc, etc.