You can tell that there must be something wrong with your reasoning by observing that meteorites regularly impact earth. You are correct that it is not easy to

You can tell that there must be something wrong with your reasoning by observing that meteorites regularly impact earth. You are correct that it is not easy to make things collide in space. But it's (obviously) not impossible. The trajectory doesn't have to be perfect, just close enough that the lowest point in the orbit is less than the radius of the object being orbited. In the case of a supermassive black hole, that's a pretty big target. The event horizon of Sgr A* is about 50 million kilometers in diameter, and that is surrounded by an accretion disk that acts kind of like an atmosphere, so anything that comes close gets slowed down through friction, and then it eventually falls in. (Also, near black holes, general relativity makes things kinda weird.) > if you are in space and throw a rock at the Sun, it won't hit unless you perfectly counteract the relative speed, right? If you are out in space in orbit around the sun this is true. But there are lots of ways to be "out in space" not in orbit around the sun. The reason that most of the stuff we see is in orbit around the sun is that the stuff that is not in orbit around the sun doesn't stick around very long. It either flies off into deep space, or it falls into the sun.