Why do reviewers criticize Momcozy and Infantino carriers despite high star ratings?

Both brands carry strong Amazon averages, but high-trust babywearing communities are more critical: Momcozy threads repeatedly flag a limited size range, no back-carry option, and marketing photos that don't depict safe positioning, while Infantino Flip threads cite fit frustration and a tendency toward a 'crotch-dangling' position if the seat isn't adjusted correctly. The star ratings are a real signal, but the specialist consensus is more measured.