Everything has to be checked and everything has to be put in balance some way or some how in my opinion.
It's the natural order of things to me, wars have to be started, diseases come about and spread, and disasters and accidents happen. It's a way to check those things and balance them.
Could you imagine if WWII didn't happen, I wish it wouldn't have happen but it did. Could you imagine the world now if it wouldn't have happened though. The world may have been over populated, a situation that some countries are at or approaching now. With every war that has come about people die... and when they die they make room for others to live. Don't get me wrong though I don't support wars, if I had any say I would make people with conflicting problems stand in the corner with their ears up their behinds so they could hear the crap thats coming out of them.
Think about all the unfortunate events that occur to people everyday. Think about viruses and diseases that people contract or get diagnosed with. Even though its sad to hear about a loved one or anyone for that matter that has become ill. You have to think back to checks and balances. If everyone and everything was healthy and no one/thing was sick how would this world function. Even though death is something we are sadden by it's essential to life, so without death there isn't life. Think about all the leaves falling off the trees now. They died to make way for new ones, those leaves you see on the ground will become fertilizer for the upcoming spring so those trees can produce again. How could you enjoy or sustain yourself with that burger or salad (if you vegetarian) if that animal or head of lettuce didn't die.
We want to eradicate disease and hunger, advert the next disaster, implement the latest in safety features to keep everyone safe and alive. Without suffering something else can't prosper, that is the bottom line... thats the way this world and ultimately this universe works. With every disease we eradicate (check) another one is discovered (balance). Yes AIDS and cancer will be cured, but another one will take its place. That is just the order of things. With every new safety feature we invent, a new way to die will follow.
We as people and the dominant beings on this planet need to and have to understand that death is something that has to happen. We are all selfish in a way when we are saddened by the death of someone or the loss of something. It had to happen; it was, in my opinion supposed to happen. I'm not saying you should, but think about it as... it made way for something else or someone to prosper...to live.