I haven’t seen anyone making that argument.
The argument I am seeing is that there are reasonable safety measures, and there are unreasonable measures taken in the name of safety.
An unhappy, bored toddler screaming in the back seat in his rear-facing car seat is a distraction to the parent/driver. It is counterproductive to employ a safety measure that is more likely to result in you being MORE distracted by your child and therefore paying LESS attention to other vehicles and the road ahead of you.