As someone who loves Aerith, I personally think it’s just unsatisfying for her to romantically end up with someone who doesn’t reciprocate her (currently ambiguous) feelings. We know now that she’s not even sure if she loves Cloud. And at least in ZA she’s not chasing a man whose real self she hasn’t met yet. The point is, it was never important for her character to know the difference between real cloud and his soldier persona and that’s what’s mostly stopping me to get on board with that ship, when it’s arguably the big reveal to the whole plot of ff7 and is the crux of cloud’s entire character. Aerith developing “genuine (romantic?) feelings” for REAL cloud is irrelevant to her narrative, if that plotline even ever existed, it isn’t at the forefront of her personal story. She doesn’t interact with his real self until after she dies, and her character motivations go beyond the fact that he had a fake identity the whole time they knew each other, despite that, after her death she helps out not just him, but the entire party, she becomes a guardian watching over the planet and her friends from the afterlife, she fulfills her purpose in the story even without a specific classification of her relationship with cloud (whether platonic or romantic)
Lots of people argue that the Z/A shipper mindset is based on a bias for Zack, but those same people also severely mischaracterizes him (he’s NOT a “generic shounen protag” like they say he is but that’s completely different discussion), they insist he’s not important to the remake trilogy or is an overinflated NPC. The game also makes it a point to distinguish Zack and Cloud’s role in Aerith’s life, Zack isn’t just Aerith’s first love, he’s, quite frankly, the original. Which is why even Aerith subconsciously (?) tries to imitate what they had experienced together romantically, with another person. Zack became HER standard. He’s someone who can’t be replaced. That’s why she knows what’s liking someone and “”liking”” someone. It doesn’t matter if players aren’t convinced by ZA’s love story, if they claim it’s not well-written or if they don’t believe that ZA is more compatible than CA, fact is, cloud should already have an advantage because Z&A haven’t seen each other in 5 years, yet cloud doesn’t act on this advantage, and even up until the end of her life, even after Z&A are separated, Aerith is wavering, traces of Zack is the elephant in the room that keeps haunting CA’s ambiguously romantic situation.
Also I personally don’t find ZA and CA to be similar in dynamics at all. In CA it’s Cloud who warms up to her antics, but Zack has always been able to respond well to her energy, he even effectively comforts her about her personal fears, something I struggle to believe Cloud ever did. I’m an Aerith stan, so I want her to be loved. If you look at ff7’s plot as a whole, she just ends up being Cloud’s “what-if” while he was out there kissing other women, and I don’t want that for her. Zack called her his girlfriend, bragged about her to literally everyone he knew (to the point of even Sephiroth being aware of their relationship) and she wrote him 89 letters in the course of 5 years. So why shouldn’t she end up with Zack if they find themselves in the same place again? Clear, indisputable mutual yearning, mutual desire, is what I want for Aerith’s love story, as someone who’s a fan of hers.