No really. How?
When I had been watching the series, I didn't see any Zutara connections. Yes, I did see the Yukka, Sukka, Kataang, and surprisingly Tokka moments, but all I saw was that Katara thought of Zuko as just a friend. And that was all.
When I arrived on FF.N to write fanfictions, I saw hundreds of Zutara stories and soon got confused. The closest thing to a Zutara moment was when Katara healed his wound in Sozin's Comet... that's it. I'm not trying to bash the people who ship the couple... but I still wonder, even to this day, how did the pairing happen?