Loving a place with a broken nose
Algren compares loving Chicago to loving a woman with a broken nose: the attachment is real precisely because it has absorbed the damage instead of denying it. Love without illusion treats a place's scars as part of its face, not blemishes to hide. This lets the critic be the harshest accuser and the most loyal lover at once, and it makes booster affection look like a shallower kind of love.