Actually I totally see your point. And by default, i would have the same arguments.
The thing is, I am trying to question what part of our pre-existing assumption are really by nature, and what part of it is a result of the social constructs.
Yes I agree sa example mo na pag nawala lahat ng existing social contracts in a snap, we will certainly see men being predators to women. But this is because this hypothetical men are a product of these social constructs that,(for a lack of a better term in my frame of mind,) corrupted them. Even the assumptions that you said is "scientific" might be a byproduct of beliefs in these social contructs. Especially the interpretation that sëx is more a function of procreation.. but in reality it is more about social acceptance. (Almost none of the people I know, including myself, performs these with procreation as motivation.)
Imagine If we were to start with a culturally blank slate humans And plop them down to an environment, would men be more likely or less likely to be sexually abusive? Because if the answer is less likely which I think it is, or at the least, we are not sure, deconstructing this existing cultures that we have which produces "corruption" is the more logical path.