Just think... if the sub never knows when they have to give an account how much more are they going to contemplate their Dom/Me knowing they may have to speak about their day?
Uhn uh uh! :sing song: the eye contact is the catch, not the punishment.
How often have you seen someone avert their face as they admit to desiring something they think they should be ashamed of? How many people close their eyes as they step off a cliff? Eye contact requires a level of vulnerability that can be overlooked in a realm where the trust represented by blindfolds is more readily recognizable.
Although I admit, that suggestion was for Dom/mes who are slightly evil.
Just think, if I were kneeling between your legs, how much harder would it be to look in your eyes if there were an obvious distraction? ...And what would you do to me if I failed to make myself vulnerable to you as you had instructed? Hm?