Correct me if I am wrong, but since not even spacetime can escape blackholes, even gravitational wave would get swallowed, wouldn't it? Of course, since we can'

Correct me if I am wrong, but since not even spacetime can escape blackholes, even gravitational wave would get swallowed, wouldn't it? Of course, since we can't "point" gravitational waves in a certain direction, because of the rest of the wave traveling around the hole would basically propagate it even directly behind blackhole (from perspective of source), but that's because the wave goes around, not trough. Or do grav waves really pass ~trough~ black holes?