I am starting this discussion in this Research Forum. You can also answer this question. I am sharing my opinions here.
Everything has a reason behind its existence and so our supermassive black holes. Black holes appear at the center of most galaxies. They are thought to play a crucial role in the formation of large spiral galaxies like our Milky Way Galaxy. Our Solar System is well away from the crowded center of the galaxy on one of its spiral arms. Our location keeps us away form the massive cluster of stars near the galactic core, a place so bombarded with radiation life as we know it would be impossible. So the chances are that as frightening and awesome as black holes seem, we wouldn't exist if Black Holes were not thanks to the supermassive one at the heart of our own galaxy.
James Hollomon in one of his post wrote that our galactic black hole does not have a large, active accretion disk around it. Such disks get accelerated to incredible speeds and heated to unimaginable temperatures. The process can convert 10 to 40% of the mass of the infalling material into energy, as opposed to the 0.7% converted by our Sun in nuclear fusion.
Be sure to post your answers in this Research Forum below. I want to know your perspective.