I think that your giving pause to aggressive steps is laudable.
I recently read the book Being Mortal
by Dr. Atul Gawande, and he encourages that patients with serious illness consider these five questions when pondering further aggressive measures (actually, the author encourages doctors to raise these questions with patients to better understand their wishes and provide better total care):
1. What is your understanding of where you are and of your illness?
2. Your fears or worries for the future
3. Your goals and priorities
4. What outcomes are unacceptable to you? What are you willing to sacrifice and not?
5. What would a good day look like?
These are good questions for all of us to keep in mind, and the author particularly stresses the first question which should be raised by doctors to assure that the patient sees his/her own case with a clear-eye.