I would despise myself forever if I let someone die, when I could have done something about it. I don't think Jeb really understand what it means to die of dehydration.
No he doesn't!
Thing is that JEB put himself in the place he is now. He took this to the court and allowed them to give an order to him and DCFS to not intervene! He could have been a leader and said screw you to Judge Greer and get Terri out without going through Greer, but he chose to bow down to Greer and for that he will suffer the rest of his life!