No because for boys age is less of an issue.
Do you think the age gap theory math is wrong, or deny that there’s an age gap (or population growth)?
No because for boys age is less of an issue.
How does that decrease their numbers? If we start with the same number of boys and girls, and they marry at equal numbers, how do we end up with more girls?
there are a lot of complicated pieces at play that make it hard to actually predict how many of each would be left.
Agreed, but we don’t need precise numbers, and without any reasonable hypothesis that more girls leave than boys (I haven’t heard one), the larger number of girls is a problem.