It didn't have to work first time. People expected it to work first time and the expectation was fulfilled. Would you deliver a stinking turd first time and spend 6 months fixing it? That appears to be the way people want to work these days but believe me the customers are fucked off with it. The entire industry is getting a bad rep due to this laziness.
You're making bad assumptions. You can either deliver a "stinking turd" in a month and spend 5 months fixing it, or spend 6 months developing and deliver the whole thing in one go.
