Garrus should never have been made a LI.
Turians shouldn't even find humans attractive, for starters. I will give the writers credit for kind of alluding to that in ME2 though. Garrus has that whole, "Well this is kinda weird..." dialogue before hand.
But still...Turians look like dinosaurs and they have mandibles, claws, and a metallic carapace. There is not enough brain bleach in this world. Bioware shouldn't have caved to the people demanding Garrus be made a LI. They should limit the romance options to characters that are either human or very humanoid.
You're just bullsh***in TBH. And so was that writer! He's the one who wrote the turian at the bachelor party saying he was attracted to asari, and the one who wrote a quarian and turian romance. So to take issue with femShep and Garrus seems like he just wanted to spite the female fans that wanted Garrus. Maybe he can't think outside the box.
Here is a female turian. She is over 6ft tall, has no boobs, no ass,a huge barrel shell for a chest, bug-like, wiry, muscled legs, two-toed big digitigrade feet, huge muscled arms, no hair, bald, fringeless scalp, exoskeletal plating, and a narrow waist and narrow hips. Their bodies look like exclamation points!
Yet, a turian can be attracted to a quarian. A quarian's only common traits are dextro amino acids, yet they have red blood while a turians is blue, so different blood proteins, three fingers and three toes total with two prominent toes. The lower legs are more inverted than turians and don't have a bone spike sticking up out of them, the feet are flat to the ground, they are way shorter, way thinner, have boobs, have jiggly asses, the hips are wider than a turian female, and they have no plating, and lots of hair. They are pear or hartman shaped. Plus they are basically humans. They look less like a turian than a salarian krogan or elcor who also have three fingers.
And then the fu**ng asari are all sought after by turians. But we know how much the asari look so attractive to turians, are totally dextro and not levo, and look absolutely nothing like humans or hairless apes as you put it.