Think about previous iterations of Superman’s Lois Lane and Spider-Man’s Mary Jane, for example.
Deadpool 2 does play into this a bit, but at least the first movie gave us enough reason to feel the sting when she does get killed in the sequel.
Still, it is a worthy conversation to get into.
The comic book genre has a troubled past with “the superhero’s girlfriend” character, who is often thrown into the mix to bring stakes to the hero’s journey, rather than being given a well-balanced character arc of her own.