Okay, my point of view:
I can't talk about living with a face like a zombie, but I cab talk about living with a disability.
I have a partly paralized left leg and when I became in that situation after my accident, the first thing in my mind (without knowing it by myself) was to survive.
When I knew that I was still living and survived the accudent, my next step was to become better.
In my situation: to get in shape, make the best out of it and I was trying to become as good as it posible could be.
First I couldn't walk, after a few months I was walking a few steps and after six months I was able to walk some 100 yards.
Now, after 20 years, I have a normal life, got a job, house and got married.
My life isn't perfect, but I realize that it is as perfect as it can be.
Life is worth living and it is what you make out of it by yourself and your family and friends.
I have asked myself and my parents why I did survive and didn't die.
The answer was simpel: because inside my mind I wanted to live, to survive and to make something out of my life.
It is not easy, and I'm still wondering if I feel the same about it if I was fully paralized and needed all help with all the normal things in live such as get dressed, eat etc etc.
I think that I can say (after all those years): yes, life sometimes is a bitch, but I'm happy that I can live that life.