This story reminds me of how we define "blessings" in our lives. Our definition of a blessing and God's definition are (as should be expected, since we're not God) often different.
"Oh what a blessing to win the lottery!" But then you don't have to work, so you have too much free time. You get into strip clubs and porn, then an affair. Then your wife leaves you. Your kids, which now blame you for breaking up the family, don't talk to you, and don't need to since they have money of their own and need you for nothing. Your brother blows through the money you gave him, comes back for more, then hates you when you don't pay for all his debts and buy him a new car (like you did for your wife's brother).
So? Blessing? Or curse?
I'm sure that family wasn't thinking "oh what a blessing" when they found out their child had downs syndrome. But now? I'm sure they would all tell you she is the biggest blessing they've had in their lives. And it's one they would never have asked God for. But He knows. It's quite the challenge to see things the way He does.