I don't think Varian is being smug. She is saying that she has been lucky. Full marks to her for being aware that she has been lucky. Her saying so doesn't take anything away from those who have not been so lucky.
She is NOT being like Foxygloves Pharisee who prayed "I think thee God that I am not as other men are" - He was pleased with himself for being better than others, not being a thief or murderer or swindler, but a man who could look at others and criticise their faults because he was good and kept all the commandments, gave to the poor, etc etc.
That is quite different to Varian saying that she has been fortunate and not suffered some of the things that are posted about about on the forum. Illness, disability, bereavement, betrayal, conflict in relationships, loneliness, depression, poverty. Those unfortunate things happened to people - they were not sins that they were virtuous enough to not have committed!
I could echo her post. I have lived to a good age without chronic or acute illness (apart from BC which was sorted out by one operation) I had a happy childhood with loving and sensible parents, and 50 years of a happy marriage before I was widowed, my children and grandchildren have no broken relationships or major health problems, I have enough money to live reasonably comfortably, enough interests to fill my life and friends and family to prevent me getting too lonely (of course I would like to see more of everyone, but they have their own lives and their own families to fit into their time)
I am aware that not everyone who reaches my age can say the same. Is it smug to say that I am grateful to whatever controls my fate for all my blessings?