Many laws of consent are out dated. The antiquated thought of womenhood was based on primative ignorance of a woman's body and her identity was sorely abused. when a female child started menstration that deemed her marriage ready. Women where generally considered breeding chattel. Simply property of men of 20-50+ years old starring at the time of menstration. Completely disregarding what the girl may have felt. It seems reminents of such barbarian thought still hangs on. In these modern times it isn't acceptable.
I'm not sure what your point is... Since modern law recognizes a right to bodily integrity -- ie, the right not to be raped -- non-consensual sex is always illegal. That's not what's at issue here.