Here is the sentence from the book,
...Forty years ago, a doctor had told him the same thing. And he had lived to raise a family of five children. He had done as much hard work in those years as any man.
Now, could this sentence be written like this?
Forty years ago, a doctor told him the same thing. And/But he lived to raise a family of five children. He did as much hard work in those years as any man
My question is, what's the difference in both these sentences? And why the second sentence is probably wrong and first one is correct? Anyone here who could possibly explain the rule?