Personally, I don't see it as a competition. No one knows what it's like to be you or me or anyone else. Surely, our own experience is the valid one. Plus, honestly, it irritates me. It would feel like a valid argumement if I could give my relatively easy life to someone else who wanted a break- and I would. I'm sure you would too if it meant we were released from this. What difference does it make to a complete stranger in dire circumstances, whether I die now or in my 80's? What affect does my life or death have on them?
I think it's fine- great even if you see them as some kind of inspirational figure. They can pull through despite terrible circumstances, which inspires me to do the same. But, if all you feel is guilt and shame then, I don't see how it helps.
Why should we feel that way anyway? Is life compulsory? Did we agree to it? Did we sign a contract, or make a promise? No- we were given life by our parents and now we are being emotionally blackmailed to contend with it. Sorry but I don't think that's fair.
I don't need anyone to validate my feelings about my own life. I've had 44 years to formulate them. It's up to me whether I want to change them, live with them or, act on them and I'm happy to let them do the same with their lives.