So, in some sense, what this is suggesting is that it's not just that people are setting up their car seats wrong, which is putting children at risk. It's just that, fundamentally, the car seats aren't doing much.
De certa forma, o que isto sugere é que não é só porque as pessoas montam mal as cadeiras auto, que as crianças ficam em risco. No fundo, as cadeiras auto  não estão a fazer grande coisa.