I've read a few different articles/threads/books and in the articles it talks about Senior Citizen vs Non senior citizen shots.
You could take a portrait of a senior citizen and have it as sharp as a tack because things like wrinkles, imperfections make it seem natural and essence is age.
When you shoot younger people you don't necessarily want to be as sharp as it might not be very (flattering).
I can tell this person is young but the sharpness almost makes her look older.
The focus is the event, the reason for the ring, the actual wedding. Not the person's hands.
I don't mean to offend by the way I'm just stating what I've seen and read. I also could be completely wrong with what I'm saying.