First understanding that this life is truly only a proving ground before moving on to bigger and better things must be known before understanding the answer. If you're limited in your personal perspective on this life - and treating it like this is it and that there was no life before here and no life after, then no, the answer wont make sense and God probably hasn't crossed your mind or you don't give Him the time of day.
The short ANSWER: God has given us all FREE AGENCY. We get to choose and he not only respects it, he is bound by it.
The long ANSWER: With the ability to choose to be good or bad, we also are choosing our consequences, for the good or the bad. When those choices effect others, it heaps further negative consequence upon us. After this life when we get judged for those things we've done there will be an honest and perfect judge. If you were murdered, you will be a witness against the accused. Justice will prevail and mercy will skip over that killer unless proper repentance is made. Of course we have no clue how just and perfect that judgment will be because while here on earth, we our held from knowing or seeing because after all, we are required to live by faith and not have a perfect knowledge of things. We're here to be tested. If we are taken by the will of another and robbed of our opportunity to experience this mortal life, then so be it, and it will work itself out for our good. Nobody's getting robbed after this life.
Like in the Old Testament times where mortal life seems to have little value, so too is it of little value now. Our physical bodies are testing grounds housing our eternal spirit. We are less than dirt (dirt obeys God, we don't). And here we are trying to reinforce our mortality with fame, fortune, "power," etc.... it's a joke. We can be taken out of here at any time for any reason...either Heaven will call us home for a new purpose, or someone down here will send us packing because of their choice. In the end, it will be something we look back on fondly as "our mortal experience." Don't fear death because probably within minutes of being dead, the big picture will play out in your mind and you'll understand everything and all the petty things you hoped to hold on to will not have mattered. Again, the key is to have the eternal perspective to this life. If you only concern yourself with you, your small sphere of influence, and your 'things', you will be stressed about dying, question "why did god let this happen???" and your life without purpose will be miserable.