"Even though she's a girl" / "but we're both girls" bro I'm so tired of this trope in GL.
Like it's totally fine for women to fall in love with each other lady, this isn't the 1900s!
After like say the age of 12 or something I'm sure you know that lesbians exist, especially living in the modern world with access to mass media.
I wish those types of corny lines would go away from all yuri.

Having heard of the existence of queer women is not the same as actually knowing any in person, let alone internalizing that identity for yourself. This trope endures because it references something true, and it's an easy way to pair a same-sex romance plot with a basic arc of self-discovery. I can relate to this sentiment when this trope is used as an excuse to actually shut down a same-sex romance plot, but I don't see why yuri should be purged of it.

It's pretty common in fiction that the main purpose of a statement is to make it even more satisfying when it's proven wrong. "I'll never join your band," says the mean bassist girl, even though we all saw her happily playing music with the other girls in the opening animation. "There is no way you will counter my special attack" says the enemy of the week, right before the battle shonen protagonist counters his special attack by punching really hard. "But we're both girls", "it's not that I like girls or anything", and similar lines should not be taken any more seriously when the pop up in yuri; the irony is the point.