It is not the same thing at all, one of them is a global "never show helms", and the other one is used to decide per char and even per set if you want or not a certain helm displayed, how can you say it is the same thing when it is not, and nobody is asking for having two ways of accesing it, i am perfectly ok with the same NPC that lets you select per char/set display, having the global "never display" for me to select.