I do not think that "Beauty" really needs to be defined. D's findings of the beautiful maybe different than anyone else's, but her statement is not dependent of that. Think of what you find beautiful and think of this statement.
The other issue, is that sure there is lots of beauty around us, but the world is loosing it sense of the beautiful. We work too much, we treat each other roughly, we live in cities that are functional but are not beautiful. We do not take the time to create a world that is aesthetically beautiful.
Sometimes, I would take a vaccation to the ocean side and I find that I feel differently, not more relaxed, but feeling more beautiful. We loose that in the way we lead our lives, we follow roles that make us steril, rigid, angry, impatient, and ugly.
I too, D, am searching for beauty. I too feel that we need beauty to live and survive. I too am afraid for our sense of the pretty.