Marcia, gee, I tnink it is very human to be grateful for the good things in one's life. But if thinking about how fortuate we are stops there, if it doesn't motivate us to reach out to the less fortunate, it is very akin to selfishness.
I wish I knew of a more tactful way to respond, but our heroes are not people who spend their time thinking about how fortunate they are; our heroes are people who spend time, and energy, thinking about how unfortunate others are, and then trying to do something about it. I think we need more heroes, such as Doctors Without Borders, Mother Teresa, Ghandi, Martin Luther King, and Jesus. Jesus never praised anyone for thinking about how fortunate they were, but he did praise the Good Samaritan. The world will not get better because people think about how fortunate they are. While praying is fine,it's also very easy and make us feel good at practically no cost to ourselves.