Best not to think too much about it.
This series was at its best with the riot merging with the zombie take-over. you had no idea what exactly was happening.
I actually would not have interfered with the father at the ranger station. I know that sounds mad--but hear me out.
It isn't really death that scares us the most--but separation.
Take this sad scene for instance
https://en.wikipedia.org/wiki/"Weird_Al"_Yankovic#Personal_life
Weird Al lost both of his parents at once. While this was bad for him of course--it was the best possible death--in that neither of his parents mourned the passing of the other. They had lived a long life--and had no reason to fear the coming of the next day. They were healthy at that very moment--but you knew pain and suffering were not far.
They died--at peace--in bed.
This is what Ricky Gervais meant in his animated show where he imagined a world where you just died--never got sick--you go home--not knowing when the end comes--but there it is--and it's your life.
I can orchestrate no better ending.
The father tried to. They would die as a family--and rise as a family--away from other walkers--and be together.
THAT"S when the group should have shown up--finished them off and buried them.
What we saw was the worst possible ending. children left on their own--separation.
I get why the mother flashed the lights. But there is part of me that wonders if hope can show up too late.
I have read tales where a person has resigned himself to his own fate--only to have a possible out show up just so--actually irritating one.
Rather like hiding under a table during a storm--with a person saying they have a storm shelter--only to be struck down in a field by debris and dying like animals. Let the house fall upon you--in comfort untill the very end--before death---
My own mother survived my father only four months. She told me things she had never said before. Told me that she had a miscarriage--that my dad dumped my favorite dog. She and my father were married for decades--and she grieved herself to death--dying in a hospital--despite a feeding tube--due to hypoxia and failure to thrive. That's what infants die from.
She willed herself to death.
Believe it or not--Weird Al was lucky. The situation could only have been made better if say--Al had a fatal disease that he was to learn of the next day--but only after visiting his parents and staying over that fateful night.
They all
die as a family that way. Your extended family..in-laws--they don't miss you the same way.
You see--the father in this episode--he knew what he was doing all along.