Calculations in relation to black holes are solely in consideration of spacetime curvature and its effects. They are in total alienation with respect to the action of inertial agents[external forces].That world lines do not point outwards from a black hole is consistent with the fact that inertial agents are absent. Can the presence of inertial agents change the picture of the world lines? Let's consider the following situation:
An experimenter [source of "external forces" capable of producing non-geodesics] throws some mass into the black hole. Its surface area and volume increase.This is suggestive of outward world lines from the surface, causing the expansion----points on the surface should move outwards.The presence of "external forces" has modified the entire perspective of the situation.
The black hole picture takes into consideration only the blackhole.Right from the outset the black hole is considered in isolation from the rest of the universe. Any type of modification due to the presence of external agents---artificial or natural ones do not figure in the blackhole calculations. Consideration of such factors can modify the picture of the black hole.
Can technology prevent somebody near a black hole from falling into it? Can it remove the apprehensions of what we know to be a graveyard?