Uncomfortable vocabulary

Hello, am I the only one who's not comfortable with the terms "seme" and "uke" (or even worse, the "female role")?
I won't deny that they make discussing the manga easier (cause I can't remember names since I'm dumb) but they still make me feel like I'm reducing a whole character only to whether he "takes it in the ass" or not.

Idk maybe it's stupid.

(Do they actually have some kind of interresting ethymology?)