the rest of the world manages with just two pressure settings - why can't we!
Well additional safety may have something to do with it... I presume you're talking from a UK Civil ATC perspective? UK Mil use QFE as their datum of choice and RPS away from the airfield environment. "Ban them" you cry... you presumably have big influence with HQ STC?
Chilli, I accept many other countries don't use RPS (but not so sure about QFE?); no one's forcing you to use them, but having them available has got to have some benefits? (Of the civil and military aircraft flying into an airfield in the SW, who for twelvve months have been given the option of using QFE or QNH... most elect to use QFE. What does that tell you?)