The SAE J1772 connector (5 and 7 pin) are pretty foolproof. That said, any time that one is dealing with the potential for an arc flash (eg contactors welded shut or something), where I guess human out of the loop would be smart.
I think this is mainly for "fancy" car owners who dont want to touch the charging station, or want to press a button in the garage and have it connect. Implementing such a thing really isnt that hard.
Plus you can be sure that people are afraid of electricity, so the no touch capability may help overcome some fears (even if not substantiated).