Probably because it "discredits" Zerith.
See, I still don't understand this either. The two choices are then:
1. Aerith is alone, unrequited as Cloud ends up with Tifa
2. Aerith is at least with someone she loves and is happy, even if Cloud has chosen another woman.
So Aerith being completely alone is preferable to Aerith being with Zack? Why?
Or is it that they just have clung to a specific passage in Maiden, and have completely blocked out the rest of it? Because then they can say Aerith loved Cloud more and CA is still possible...
This seems to always be a recurring theme in a lot of what I see. They present arguments that they don't realize also apply to themselves (Aerith can move on but Cloud cannot, etc) or they want the story to change (Aerith being alive) even though, in their mind, CA is canon in the original game and Cloud and Aerith reunite in the Lifestream. But also once again, it seems like they want Aerith alive for shipping reasons, so the story being changed doesn't apply to Zack coming back to life as well. Okay, but they want Aerith to be in the Lifestream sequence, but claim that it's not a romantic scene between Cloud and Tifa. Same for Under the Highwind.
Those are just some examples of many that I've found where the logic doesn't quite make a whole lot of sense. There are just holes and double-standards.
Because Maiden Tifa is only taking care of Maiden Cloud, i.e. keeping him company until he dies. Then his true afterlife romance begins after the story ends (this is clearly implied and only delusional haters would claim otherwise).
Honestly, this makes both Aerith and Cloud out to be horrible people in that they will take advantage of another's feelings for them. But Zack is a horrible cheater because he once asked Cissnei out to dinner. It's okay for Cloud to kiss another woman out of jealousy... but fuck Zack for having peak rizz.
Once again, the logic is amazing. /s
There is no hope for this fandom. The salt for Part 3 is gonna be intense.