Here's why:

* Quasars are powered by supermassive black holes: Quasars are incredibly bright objects that emit massive amounts of energy. This energy is generated as material falls into a supermassive black hole at the center of a galaxy. The black hole itself is not the source of the energy, but rather the engine that drives it.

* Black holes are incredibly dense and powerful: Supermassive black holes are incredibly dense objects with immense gravitational pull. They are essentially the densest objects in the universe, and their gravity is so strong that nothing, not even light, can escape their grasp.

* Quasars are a consequence of black holes, not their destruction: The energy released by a quasar is a consequence of the supermassive black hole's activity, not the other way around. The accretion disk around the black hole, where material is spiraling inward, is the source of the energy that makes quasars so bright.

In essence, the relationship between a supermassive black hole and a quasar is like the relationship between a furnace and the heat it produces. The furnace (the black hole) is the source of the heat (the quasar), but the heat itself doesn't destroy the furnace.