Thats exactly the answer though, more authoritative reviews. It's the same reason Rotten Tomatoes differentiates between a score and a top critics score. You can have a consumer reports score, and an amazon verified buyer score. Professional reviewers and aggregate buyer reviews.
Theres actually lots of wirecutter type sites for different things, however there are just as many sites that seem to praise EVERY product they list, and sometimes there can be hundreds of sites all saying the same thing. https://electricbikereview.com/ is one where I have trouble telling which ones he likes more than others, because he is so positive about every features. Mattress and credit card / financial review sites have spun up like the plague.
This is also one of the few places where I think the government could step in, where it currently isnt, and the Attorney General should run their own version of https://www.slant.co , wirecutter, consumer reports, yelp, better business bureau, https://thesweetsetup.com/picks/ etc. Some combination of government reliability and safety ratings, mixed with verified purchase reviews. It's a perfect place for the government to help cut through the paradox of choice and misleading or loud advertising, and help consumers find good products from the rough.
As far as restaurants go, even just a nice aggregation app would be nice that could pull together and normalize scores from yelp, facebook, google, trip adviser, foursquare, zomato, opentable, zagat. It would be really nice to be able to see which restaurants end up popular on which sites, how scores compare across sites, An additional benefit of aggregation would be, if the app can find "like reviewers" that you should follow, people who vote similarly to you.