Originally Posted by BullBlitz
Because there are plenty of options, from QB masks with very little iron to line and LB masks with plenty of protection.
The ones they are banning aren't adding any extra protection in the design. These guys are pushing the envelope to try to do anything they can to visually set themselves apart. They have a number and a visible name on their jersey unless they wear their hair so long that it can't be read. That's enough.
I'll bet you want to ban QB audibles also because that might lead to individual thinking.