Because MANY people do NOT want the same system as other MMOs. The closest I can think of that might work is Rift's system, but even it still needs to be perfected and worked out and changed to work with TOR's system.
As long as it's NOT in player hands to decide, I'm fine with it.
Some forum goers interests =/= interests of the general masses
The fact that millions more people are content to play a game that has it is evidence enough that they're happy with the way it works. Again it's just BioWare wasting time and resources on pointless solutions.