Why is life so fragile?

I don't get it. We as humans spend 9 months in our mothers' wombs. Our parents then raise us for another 18 or so years before we are officially adults. Yet, in the fraction of a second, all that can be taken away. Life is so fragile, and I can't get my arms around it. I really can't. In the past month, I've been to a memorial service for a 24 year old, and heard about another service for a 26 year old. The first was a freak car accident and the other a suicide. All that time spent growing up, going to college, and getting a job, etc. In seconds, they were gone. Some say that's just part of life. Shit happens, and sometimes people die before they're supposed to. They take solace in the fact that heaven is taking care of the dead. Yeah, tell that to these two's parents. I'm sure they will have something to say about that.

I've struggled with emotional unstableness pretty much all of my life. Add that to the pressure to succeed and make lots of money, I can't even say that I know myself very well. And what if I were to kick the bucket tomorrow? Would I have looked back and say that I lived my life to the fullest without any regrets? The mere fact that I'm posing this question makes it kind of rhetorical. Maybe I should just stop analyzing so much and use that time to live instead. Someone said, in the long run, we are all dead. Sadly, although I still can't grasp it, I will eventually have to abide by that rule as well.