It's a legitimate point - the criticism carries more weight if its part of a unified collective consensus (e.g. the Unity fees debacle) than if it's a bunch of all-over-the-map criticisms that all contradict each other (Gamergate). Seems straightforward enough to me.

The latter can be especially important to observe because sometimes people are just full of it and it's all just a bunch of vibes, where people agree something is wrong, but they can't settle on a coherent idea. In those cases that phenomenon is often the most important thing to understand. I would go so far as to say vibes based psuedo-consensus is one of the most common things manufactured by internet mobs.