This presupposes that humans are incapable of behaving well. Most people operate in good faith. Some people are dicks. Don’t put the dicks in charge. Create processes and systems to screen for dicks.

Yelp is a great example of a beneficial review system run by dicks. A objective review platform would be a huge benefit. But they corrupted the intent. They solicit bribes from businesses to suppress negative reviews using their default “suggested sort”.

A review platform run honorably for the public good could entirely replace advertising, increase competition in areas of price and quality and create a far more pleasant society. Instead we get the endless bullshit machine aggressively selling you things you don’t want or need while burying true value in a mountain of mediocrity.

Advertising is where capitalism started to go wrong. The more our society resembles it the worse it will be for everyone.

Thats what Im saying - the ideal "review platform for the public good" is impossible in real life for a variety of reasons.