alt Hacker NewsI had a similar epiphany watching S1E5 of Fargo.
"The winters are cold... but I can't complain. My socks have holes... but again, do I complain? I do not. The oldest needs braces... the youngest once sneezed for three days straight... but who could complain? They're gifts."
"Children?"
"All of it. The cold, the holes."
For all of the complaining we can do about our hardships, it's a gift to even be able to complain. When someone says, "Life is good", they're right even if you feel like things are shitty -- because life itself, being here and alive, to be able to feel and to think, is a wonderful gift.
I think you're getting at the heart of the sentiment behind the original quote better than the blog post.
The blog seems to be treating it as aspirational -- a goal. A puzzle to be understood and applied to make our lives richer. It's more of a perspective shift.
When you really get it, you won't think you're supposed to like bad sandwiches -- you'll realize what a gift any sandwich is. What a gift it is to sit in any crummy airport eating a soggy sandwich. You won't have to try to like it, you'll cry with gratitude at how lucky you are to even be there.