This is not like red hair.
That's still very much part of our life experience.
This is in the realm of the absurd. Sometimes the downright monstrous, like some of the rule34 stuff. Red hair is just...human.
At the end of the day, I think people just need to get laid actually.. and just appreciate how good the actual thing is. And actual type of people you do it with.
This is a game with giant flying fire-breathing lizards. Biologically that's absurd. It's a game with magic and bald elf gods in hobo clothing.
But it's also a designed fictional world with internal rules that (usually) keep it consistent. Things fit together logically, unlike the scourge of red hair in our world. 
Qunari are part of this logical world. Cassandra likes the Inquisitor. And Cassandra is Cassandra, so of course the Inquisitor likes her.
I also prefer the DA2 design of the qunari. Mostly because of the Arishok stealing the show. 
I don't think the Adaar Cassmancers exist because they don't appreciate sex in real life. 
That being said, I know of a few forumites that seem a little...frustrated with their lot in life. 