In Fury Road, Furiosa learns that the Green Place is no more.
There is a ~5 year timeline between the events of Furiosa and Fury Road. And about ~15 year gap from the time of Furiosa’s kidnapping and her final showdown with Dementus.
In all likelihood, the Green Place was already destroyed and gone by the time she tries to make a run for it with Jack.
So that walk across the desert with Furiosa removing her arm and falling to her knees, hits harder because Furiosa comes to the conclusion that perhaps Jack death was meaningless because unbeknownst to her there no longer existed the Green Place at the end of her star-map.
That scream of despair in Fury Road wasn’t just her grief that she would never see home again. It was Furiosa realizing she failed the wives and Jack died for nothing.