Calling the gravitational strength inside the event horizon infinitely strong is a poor choice of words, but it's not exactly wrong in layman's terms since escape would require infinite energy.
At the same time, it's not like you instantaneously travel to the singularity once you cross the horizon, which is what a true infinite strength force would do.
TheOwlMarble t1_j10r1i3 wrote
Reply to comment by hurxef in How gravitational waves can 'see inside' black holes by burtzev
Calling the gravitational strength inside the event horizon infinitely strong is a poor choice of words, but it's not exactly wrong in layman's terms since escape would require infinite energy.
At the same time, it's not like you instantaneously travel to the singularity once you cross the horizon, which is what a true infinite strength force would do.