Three Identical Strangers : TrueCrime

I just finished watching Three Identical Strangers! The scientific side of me is so intrigued and I see the appeal of the study but the human side of me sees the pain and destruction too. I was watching and thinking this in horrifyingly fascinating and then I saw the research assistants smiling and laughing about what was done and I felt sick. How can they laugh (maybe it’s nervous laughter, I thought) about something that was so traumatic to so many people and yet they know there are still people out there who don’t know each other but are twins! What are your opinions on this whole documentary or on Twin/Triplet Studies?