Below is a screenshot of a silly argument.
I wouldn't say delusional... just observant.
So, I'm also a Dramoine fan and have been since I read the books way back when they came out. Now there is a little bit of me that is kinda not interested in Harry Potter because of all the contention with JK Rowling and her... opinions.
There really is no comparison between the ships on an individual level. I say this because it's kinda like comparing Sephiroth and Vergil (Devil May Cry) from different universes and power scaling in those universes. It just doesn't work. Bad example, but you get what I'm saying.
Dramoine is a great pairing when you get towards the end of the series (Half-Blood Prince and onwards) it works because that is when Draco is battling himself over following Voldemort and his own morals. This is when Narcissa makes a deal with Severus as well. But we get the understanding that Draco does, in fact, have morals. He is just a kid being asked to do something he doesn't really agree with and can't bring himself to do. He is also a coward and a bully. Let's not forget that. I'd also say Classist since he is raised to think that Mudbloods are beneath Pure Bloods. He belittled Hermoine every chance he got, but also found out she could stand up for herself. This is a great enemies to lovers ship... there is no question on that.
Now on to Zuko... who is similar in some ways to Draco, but the similarities are minor. Zuko always had morals, and he always had good in him. He did bad things out of desperation because he was troubled. His frustration is out of trying to prove himself to his narcissistic sociopath of a father and getting the chance to regain everything that Ozai seemingly took from him. Getting to Katara here, it's clear that they were enemies at the start. But how can you do enemies to lovers when enemies to friends IS IN THE SHOW!
So I don't know what to tell you.
By the end of Book 3, Zuko and Katara are friends. It's written in there for everyone to see so I don't really get why going one step towards romance is such a big deal?
The only defining line between romance and friendship is how far you are willing to go with intimacy.
As far as Katara not wanting to marry into the Fire Lord's family... I don't see how that is a factor when you care about the person you marry more than where they came from or their origins. Not all relationships are like that, but it can be that way. But yeah, Katara and Zuko are friends by the end of the show. So, that argument is silly.
It's just another cherry pick with no thought behind it.