You're quite good at digging your own grave.
In light of the above statement, you might not understand because you don't go instant splat all the time. I'd love to set enforcers up with the defense of a doctor and the "PvP aggro" generated from those red nano effects that comes with it, if we can have your defense in return. Including fear, high AAD, rage, HP, alpha dmg, etc etc.
Wait, scratch that. I just don't think you understand - period.