My take on this is no they don’t. As long as they are truthful they only report on the quality of the product and prevent many people of spending a lot of money from losing it by buying something that doesn’t work.
If your product is shit your company does not deserve to be shielded from the backlash, this is the core of (classic) capitalism after all.
And just because he’s a normal person and says he’s not a professional does not make him a bad reviewer. He’s a normal person who notices normal things we would all find annoying. I pick out things similar to how he views things so his views are definitely useful. You can latch on to anyone you want, but having a real person look at an object and find faults we all would hate is exactly the right person to review something.