Hey they kept me in the dark as well for quite a while till I had to go for a big operation. However do not blame your parents for 2 reasons. 1) Way back nobody knew that smoking will cause this and my Dr says that nowadays at least 30 to 35% of people that gets it never smoked. 2) We did not know about co2, fumes of spray painting, asbestos, diesel fumes, paints that we previously used and insecticides all of which can cause Emphysema. My mom had it - she never smoked nor did anyone one in her family. She was on oxygen the last 2 years of her life and passed away at 83 due to heart failure.
Life happens and we must make the most of any situation I discovered after my diagnosis - it was a process to get where I am now. Denial, anger, blaming yourself depression and then acceptance. I live life to the fullest now and got a huge sign on the back of my Nissan Patrol - Everyone must die - Some people never lived.
God Bless all you good people