Polite question: why are people shipping Elsa and Anna??

I realize others might like this ship, so if you like this ship you might want to not read this post.

Luckily I've only seen one fanfiction, one Reddit thread and one TikTok video about it so I'm mentally preparing myself if this is actually a more popular thing. Obviously it's nauseating because it's incest, and also it's impossible to fit that into the frozen story at ALL. They love eachother only sisterly, and anyway I know very little about this I'll let you guys make a thread.