I appreciate the comment but I don't know how to answer that.
I smile, make a slightly awkward noise and give the stock reply of a slightly embarrassed Englishman. "Oh......erm...........I'm not sure about that"
Then I change the subject.
"Look, (points upwards) a hot air balloon."
I have no answer for the same reason any parent would have no answer.
They had no choice, they didn't ask to travel through life by this route and luck played no part.
If luck did play a part then they appear to have had very bad luck.
I know no offence is intended and none is taken.
I appreciate the sentiment.
Perhaps I should just say "Thank you."