"To deny that we are reliant on others seems almost delusional" there's no almost about it.
My guess is that narcissistic people don't feel good about themselves - were probably demeaned and/or ignored in childhood. Our culture still encourages this - despite much verbiage to the contrary.
I think by helping people focus on unmet needs it is possible to help them open to their situation and the others in it.
More information about formatting options