True. This way they give a reason to choose the Scout class.
But its an ability like I said, that I think, should be common to every class after they ve maxed out their levels.
Its a pitty they use it just to make more appealing a specific class.
They could add a silent footsteps specialization to the Scout class exclusively though and have the 0% clicking noises available to all classes as a reward for reaching lvl 150.