Our inablility to know God's reason doesn't mean that He doesn't have one. It simply means that we don't know what it is. We would have to be God to know all possible reasons. My dog doesn't understand why I had him nuetered (testicular cancer) but that doesn't mean there was no reason. I know three blind Christians. They are content that God has a reason. They have a faith that God will make it right. People from Africa tend to understand that life is what it is. Funny how those doing the most whining come from rich western countries.
God is love. That you want God to pay you off with life in paradise on earth is your hang up. That you wish to get your theology from Sir David Attenborough is your problem. You would do well to read works from people that have training in theology. This does not include crap from the WTS.