Any reasonable thing can be tested at the shop. No reviewer can tell you what kind of wear and tear you will get in YOUR car after 50k miles. That's just stupid to even imply.
Sure you can. You can clearly test if a folding phone is what you want. And if it breaks later - you RtM it. Like with anything else - no amount of reviews can fix that. Maybe they were using it wrong. Maybe it is really that fragile. But by getting it for yourself and using it (if you want it duh) - you have your own opinion, rather than relying on someone else's.
Yeah, the trick is to apply to the herd with the shepherd you like. Echo chamber.
The only reason I use reviews is - I hate shopping, so I just look at what the product is like - and technical specs (which are objective) I skip all the subjective stuff, I don't care who the reviewer is. I just google the product and look for what I need to see about the product. I do research not opinion hunt. If I liked shopping - I would just go to the shop and take the product in my own hands.
Not a single sheeple admits being one. That's the shepherd's trick. Every sheeple thinks they are not.
You can totally go dark side in a snap in a fit of anger. You can switch back as fast as well, that's why Jedi don't become Sith after just one slip. But palps only needed Rey to be in that mode for a little while.