I guess none of us never knows how much is "too much to handle" for someone else. I feel much as you do - why rush it. However, I can understand someone who is incurably ill wanting to die sooner rather than later. Other than that, with some time and perspective - most problems don't look as bad as they did at first. Unfortunately, it's the people that are left behind to wonder "why" that will suffer the most. Especially someones family and friends. I guess all that you can do is try to learn something from this and move on.
I'm sorry for your loss

Kathleen