Please Explain

There are things that happen in this world I don't understand.  I don't understand how a man can capture three young girls, hold them captive for ten years, and abuse them.  I don't understand how  a doctor can knowingly abort babies in the final trimester and then kill them.  

Here is something personal that I do not understand.  My son and his wife married for the first time in their late thirties.  My daughter-in-law began trying to get pregnant immediately.  Partly due to age and partly due to a strong desire to have a baby.  After two years of trying, they tried the last thing on the list--invitro  fertilization.  They didn't tell anyone for several weeks because of the chance of miscarriage.  When the doctor felt it was safe, they told family and friends.  The baby was due in August.  We were ecstatic and began making plans for our first grandchild. 

This morning at 5:30 our son called to say that during the night, our daughter-in-law began to feel ill.  He took her to the emergency room.  Her blood pressure was extremely high and dangerous for herself and the baby.  An emergency c-section was performed.  Our baby was delivered at 27 weeks, weighing 1.4 lbs. and 12 in. long.  He was born crying--a good sign.  He also has a temper which he has displayed to the doctor several times.

Our first grandchild at 27 weeks, 1.4 lbs. 12 in. long.

Now here's what I don't understand.  Here is a couple who has spent the last 2 1/2 years trying to have a baby.  Now they are fighting to keep this one.  I know they are not the only couple who is going through this.  Yet we have couples literally throwing their baby away.  They don't want him.  He's an inconvenience.  He's expensive.  He requires too much time.  We have a couple willing to spend their time and every cent they have to hold a baby in their arms.  We have couples whose arms don't want to hold a baby.

Where is the logic in this?  Why is it some want and can't have while others have and don't want?