Ah ok I see what you're saying.. :)
But I think that if it became habitual to just do it. Then yea, it would be pointless (As you said, doing it without thinking)..
BUT, if it became habitual that you did it ALL the time but when doing it, actually increasing your awareness, then it would be very good/helpful.
So, I guess what I'm saying is that it can go both ways. Could be bad, could be good, depends on the person.