Why did Jesus have to die?

I think it comes down to the purpose of the planet Earth.
I think God made the Earth for his own purposes, his pleasure. I think that life on earth was made by God for Him to see if people would worship him or choose sin. For this reason he created this planet, this universe, with laws in place about sin. I think it gives God great pleasure in seeing a baby develop into a man, be crippled, find his strength in Jesus Christ, repent (change his life), and be prepared to serve him in heaven. That's why he gave His son, because of the love he has for us, and it was the only way because of the way He chose to created the earth. And the purpose he had for the planet.
I hope that can make some sense, but maybe not, seems kinda off the point on a re-read.