Rockets don't have fins

 With all theses rocket motors/funnels the ship is guided by the attitude of propulsion - a non scientific point of view To further guestimate if one motor fails another could be used as a replacement  So why do they (ships) blow up  You'll have to ask Musk that  Or maybe buying one of his cars would make him feel better  This is not to diminish his genius and fortitude regardless of political preference  He could be called the Henry Ford of the space age Certainly one of its progeny

source     space.com