What is "lint-picking?"

I googled "lint-picking" and this is what I found: from Julia Cameron's The Right to Write:

"When people cannot see the larger picture of what it is we are trying to do, they will pick out some detail and pick at that. We have, many of us, had the experience of being all dressed up, ready to go somewhere and feeling pretty marvelous, when someone - a parent, a friend, even the baby-sitter - picks a small piece of lint off our outfit. 'Lint picking' is focusing on the small imperfection rather than seeing the greater glory of the whole."