Sorry but where are you supposed to find a partner? I understand this brother's concern specially if he has a smaller family and a LOT of people barely have a Muslim family to give them connections.
The "have patience" is ok. But اللهُ does not change a condition of a person, unless he changes it himself and this means in All aspects. You can't just sit at home and wait for a spouse to walk through the door, sure if your mom and dad look for one that's different. Most of us do not have that wonderful opportunity.