The advantage is the intimacy and the removal of the tiny barrier to cruelty involved in having to draw the taser. Constant access to pain-giving in a way that isn't obviously weapon-use on a recording, and since they're worn all the time there are easy excuses for "accidental" usage.

There'll be some chud looking solemnly at his hands and thinking that now he has the power of a god in the palm of his hand, and They should show some respect.