Since the gravity of black holes is very high
I feel there's a slight misconception floating around this expression.
Black holes have a quite ordinary gravitational fields at stellar distances. They're no different from any star in this sense. Their field is governed by their mass, which is not particularly larger than stars for typical black holes ( the majority of which are the dead remains of an even larger star ). This reputation for a very high field is only relevant when you're close to them.
The black holes at the center of many galaxies are exceptionally large and that means they are proportionately stronger, but just being a black hole doesn't make an object suddenly gain a stronger field than it's mass would dictate. In some ways it could be said to be safer - it's harder to collide with a black hole than a sun simply because it's smaller for the same mass.
The black hole thought to be at the center of our galaxy is estimated to be about 41 light-seconds across which makes it about 9 times the diameter of our Sun. But our Sun is a pretty mediocre star and there are many stars larger than that. The largest we know of are estimated to be over the 1,500 times the Sun's radius.
So as we start the New Year, can we take a vow to stop portraying harmless black holes as monsters of high gravity ? :-)