100% fluency is an unattainable goal, because all people have some disfluencies time to time, even non-stutterers. I look at stuttering as I'd look at a pebble in my shoes. It's there, it's not a shameful thing and you'll be able to walk even if it's in your shoes until you die (of course it'll make you limp and cause some pain), but it's probably still a better idea to try to get rid of it. It has no purpose and it's not something that makes anyone a "unique" person.