There are many things in life that we wish we could change. The truth is no one wants to experience despair, pain, selfishness or any of the bad things that happen to good people. I'm a firm believer that God (or whatever you call your higher power) doesn't give us more than we can bear. I'm also a firm believer that some of us (myself included) can and probably will always bear a great deal more burdens. Why is a question I can't answer. Because I can, is one answer that comes to mind. Because I'm not someone who will break and give up and quit.
Just as I have a friend whose soft-spoken voice and calm nurturing demeanor is an inspiration to me as a mother perhaps my own struggles will serve as an inspiration to someone else. I don't ever ask myself if I can do something, but I often worry about the how. Somehow though it always seems to work out one way or another. Folks that's called faith and elbow grease and that's how I get things done.
Everything in my life has been an experience from which I gained knowledge. These experiences good and bad are invaluable lessons to us in continuing our journey. Giving up one of those trials means losing a little piece of the perspective I have now and that's not a choice.
Best of luck to you on your journey and may it bring you much wisdom.