Can I ask what the problem with that is?
Please reconsider this question. Do you actually need to be told what the problem is with saying that most of a game-race of beings is the result of sexual violence?
Imagine turning to a significant woman in your life (mother, sister, romantic partner) and saying, "So, enough people are raped in this fictional world that we need a separate set of game statistics for the children. And I like it that way. It seems realistic to me."
Maybe the imagined reaction will answer your question for you.
Orcs are in fantasy fiction to represent the worst aspects of humanity when in war.
Maybe in the past they were. I don't think it is that simple any more. The orc trope has grown beyond that limited view.