Most Helpful Guy
Probably because they don't really care that much about it and don't know what else to say
Most Helpful Girl
Sometimes they don't know what else to say. Kind of like limited words.
Or, they feel bad that things didn't work out, stayed happy.
"I am so happy for you, you deserve better,' close friends, sisters, or just whoever you are close with would say something like that. (Depends on the situation/divorce.)