I don't feel attacked at all. In fact I really like this kind of in depth character analysis. This does make the section where you need to sneak past hyenas make more sense to me character wise.
It seems to me like Mezz can tell that he's just a few words away from just "giving in" but he's still so determined to complete his mission. So even under what amount to extreme danger and a high likelihood of falling he's still not giving in and it takes drugs and implanted conditioning to make him do so.
I do want to say that the original idea is more like "how much the conditioning and repeated fucking is affecting him and wants to indulge even for a moment" than "he's an inherent slut wanting to let loose."
But understanding his character more makes that not work more in my brain now. I get why he wouldn't do that. It's interesting that I often see a lot of character depth and porn games like this. There are obviously games where that's the whole point but I often see it emerge seemingly as a side consequence as well. I think because it brings out things that are crying out to be explored creatively but don't get explored in a lot of media.