Yes, but in my experience this is more an exception, compared to the vast majority of people who never ship anything, because "it's not quite right yet". That's where the danger lies.
And I think there are plenty of similarities between art and tech, regarding this.
For a web app, it will have to be shared before growing in quality and becoming great. Github, Basecamp, Twitter all did that. It's always about having a first released being a kick ass half or a half ass product (Getting Real was phrasing it like that if I recall correctly).
Same for a film. It might be released on a specific date to a wide audience, but it has gone through many iterations, discussed between dozens of people.
And just getting it done does not mean that you have to stop everything once your deadline has passed. If there is more work that you want to add to improve it, do it. But at least you've shared it as an intermediary stage, and you and your work have probably both grown from that. And you can now give yourself another deadline.