I mean, we don't see much of the MC in the sex scenes anyway.
Yea but hes has dialogue lines in them, the story and "first person" aspect of this story is what makes it so amazing. If that isn't vibing for someone, it might not be as good.
For example, one of the reasons I didn't really do well with Book 4 was because I was forced to play as Tenzin. Tenzin isn't... sexy... hes a cool looking guy, but hes old and hes not something I would sexualize.
Edit for clarity:
I still enjoyed book 4 a lot, but I wasn't crestfallen when it was over like I was with book 3. With book 3 I was just like: "Fuck man... how can I even go on without Toph's cute little self around to tease and cuddle"
with book 4 it was more like: "Well, thats over, oh well."