Keeping away from all the physics,for I remember reading somewhere Feyman saying,"Nobody understands Quantum theory", I'd just like tp put a question forward,one I read in a sanskrit text about 2500 years old that still rings true today.

"Why is it that Brahma(God) made this world and left it so?
If being all powerful he leaves it so He is not good
And if not all powerful,He is not God"

I've found that the deeper I tried to go into the question, the murkier it became, and with no true answers that would stand the test of logic and proof, I felt it was better left to individual faith, for it was important to the psychological health of a lot of people I came across in everyday life.That's something I've stood by. The only exception I make is to beliefs and practices which harm humankind.