I think that's ok. I mean, I don't know how it could be trusted.

First, it's not an easy question to answer, especially for products with many qualities. For example, qualities of a kitchen knife: looks, ergonomics, steel type, ease of sharpening, edge retention, handle materials, grind, shape, thickness, weight, weight distribution, ease of maintenance, etc. Some qualities are opposed and some are subjective, so you can't "max out" a knife's qualities.

Second, even for unitask items, like a fire extinguisher, a store exists to make money. They'll always push you towards items with highest margins.