Does anyone else feel uncomfortable with this "top/bottom" thing with ships?

I've always seen it as some weird power dynamic thing considering I am a huge fan of relationships that are equal, because aren't they supposed to be equal? It doesn't help that this type of thing often occurs in places (aka Fandoms) where underage folk dominate and that really rubs me the wrong way. I dunno, it's a bit difficult to articulate how I feel about it. All I know is that I feel uncomfortable and irritated by it.