Excuse me, but how is it worthless? It might be less preferred by one as opposed to Personality or Weapon skills but for a sneaky non-violent playthrough I'd say it's a must.
I've recently taken to distracting NPCs with one of my characters while opening doors with another one (I haven't played the game on development stage so it's a feature I never suspected about and I find it very realistic and therefore awesome). You cannot, however, bang those doors open because of the sound produced. You either open the unlocked ones or leave empty-handed (in my case, as I don't have lockpicking).
