your statement comes off a bit ignorant - a failsafe would just pop the latch (and up and down motion) and wouldn't be impacted by braking forces (front and back motion)
you weren't explicitly saying bad things about Elon Musk
But the general idea of things still working despite failure is the essence of what the OP was saying. People seem to not like comments that refine what others say (I have plenty of experience there), they prefer comments that either correct or blatantly support the parent comment. I don't get it, but whatever.