Probably because it's no different than putting much into friend's opinion, which is "
relying on someone else's knowledge and taste".
You're free to listen to opinions and not forced to believe any of them.
In my case, I already knew enough about the film and this review only confirmed my assumptions.
An example of why I read
"professional" criticism:
I had no intentions of seeing "Jurassic World", but went there because of possitive casual feedback it got over first two days of release. It was the most painful cinematic experience I ever had, but it was my own decision and my own fault.
1. It's not a question without a question mark
2. Your "question" is unclear