Why are black holes not dangerous?

Through the efforts of various media, as well as fiction and science fiction, black holes have acquired the image of very dangerous space objects that supposedly absorb everything in their path and can suddenly swallow the Earth. Let's figure it out if this is really so?

Black holes are objects with huge mass, which means they strongly attract other bodies. Indeed, if any sufficiently large black hole attracted the Earth or any other planet or even a star, it would "swallow" it. And yet black holes do not pose any heightened danger to humanity.

There are two reasons for this:
1. First, a collision with any cosmic object, even of a significantly smaller mass than a black hole, such as a large asteroid, another planet, its satellite, or a star, can also lead to the complete disappearance of life on Earth. Therefore, there is no particular reason to separately fear a meeting with a black hole (after all, it is not so important whether the black hole will "suck" the Earth into a singularity, or it will burn up inside another star). Thus, if you are afraid, then it is worth fearing any cosmic encounter.
2. The second reason is even more important. For the Earth an encounter with a black hole is the least likely of all possible cosmic encounters. The fact is that black holes, as already mentioned, are very massive objects. They are comparable in mass or even bigger than stars. Objects of such mass cannot sneak up unnoticed, at first they will act on an external object with their gravity for a long time, changing the type of its movement. This "sneak" can eventually last for millions of years before the black hole takes up "suction". And at the moment, no one interferes with the calm and uniform rotation of the Earth around the Sun, i.e. nobody sneaks up on us.

Thus, the main thing that needs to be understood about black holes in terms of their danger to the Earth is that such massive objects as black holes do not wander through space; on the contrary, they form the laws of motion of other bodies with the help of their colossal gravity. As a result, it turns out that these are the rest of the bodies, as it were, "wander" around the black holes. So, for example, in the center of our Milky Way galaxy there is a huge black hole around which everything revolves.

It is also important to note that the rest of the bodies do not quite "wander", but move in accordance with the fundamental laws of nature, along specific established orbits. Our galaxy is no longer young, and movement in it is already established. This means that all bodies have already formed, due to mutual gravity, some general picture of motion, in which each has its own place, and collisions of large objects do not actually occur.

Everything that should have collided has already collided, everything that should have been absorbed by the black holes has already been absorbed, and the rest of the large bodies, such as stars and black holes, whirled around each other in a steady dance.

That is why we are least threatened by a collision with a black hole or other star. But with small objects like asteroids, collisions are possible. It is the one that should be feared, and methods of warding off such a threat should be developed. Fortunately, many scientists are doing this. In this aspect, the main thing is, first of all, observation of asteroids. It is being actively and carefully conducted. Also, ways of changing the trajectories of dangerous asteroids are already being developed. Humanity should achieve significant success on this path in the coming decades.