It is more dangerous to loose to someone on the street.
Tuna fishing is more dangerous again.
Actually the most dangerous thing you can do, is to live. It assures you will die.
As for your comment it is actually just bull, you have no statistics to prove tuna fishing is more dangerous than beating someone on the street. Because there is none that has gathered how many have fought on the streets vs how many have been harmed. (Or defend yourself against harm is not for you?)