Why do people fin sharks?

Why do people fin sharks? People fin sharks for only one reason to put in to your soup for some more flavor  in your soup. That is just pain silly because they just cut off there fins and throw the sharks back in to the water for only the shark to slowly sink down to the bottom of the sea and sit there to die or bleed out. Some of you might think that this is just gross but this is happening every where in the world. Slowly all sharks will  be come extinct and just bones of the creatures to remember it by like dinosaur's.It is getting out of hand people up to 100 million sharks are killed each year for shark soup. Almost all type's of sharks are extinct .
Picture