Given that puberty in girls has been trending earlier as industrial society progresses, its almost a certainty that "she bleedin'" was a mid-teen thing for most of history anyway. An age when most boys were already working actual jobs, if they weren't years into hard labor on the family business anyway, because the concept of adulthood were usually based around them. So they wouldn't be some innocent "child wife," but more of more world ready highschooler.

Good analysis of what's going on here. So many people, even on these forums, get caught up debating "what's the right age?" that they entirely miss the real world issues that they're attempting to define. They approach it from the perspective of regulating a recreational activity rather than one of the most deeply significant issues which defines the course of most people's lives. It might be easy to imagine a consensual one night stand, while missing the harm done by arranged child marriages.

Edit: I actually have a pet theory that the focused debate on age is deliberately ignoring the base reason we care: that much older people can easily mislead younger people due to their significantly greater experience with life as a human. I feel as though, if we were to have a significant discussion about this type of abuse it may threaten some significant tech companies who take advantage of the same lack of worldly experience to addict and entrap youth openly. A very significant portion of which does, in fact, prey upon youthful sex drives.