When you think about it there are many situations in life when you could be grabbed by the wrist(s). It's the favorite method of doormen and security, it's favoured by groups of muggers, it's favoured by people who think they are much stronger and bigger than you, (especially bullies) it's favoured by someone trying to pull you somewhere. Etc.
Oddly enough, the one time anyone actually laid hands on me...he grabbed my wrist.
He was a lot bigger than I and a lot stronger. This was the summer of 1975, before I began serious aikido training so I didn't know how to respond.
Fortunately, he was harmless. But he was the last stranger that laid hands on me.