Why do we keep trying to justify using a simple flat splint to align the many bones of our curved, articulated spines?
We keep trying to put a square object in a round hole. Small children do not make this mistake.
The spine is curved.
The board is not curved.
Does the board offer any real protection?
It seems that the board is just there for security theater.
We make a big show of dressing people up in a collar, a backboard, blocks, and straps. Do we have any reason to believe that this fad works?
Bleeding patients to get rid of the bad humors lasted for hundreds of years, so this backboards are still new and in the fad category.
Security theater is the practice of investing in countermeasures intended to provide the feeling of improved security while doing little or nothing to actually achieve it.