Bless me with lore. I want to hear your opinion

Why are most of the replica's female (except the adler model)? I understand, that it's the decision of the developer (I know she's female), and i dont have the right to judge, but i just want to have an discussion. As i read from the notes throughout the first chapter, i understood that replicas are robots with the copied mind of an human. I have an question, in the whole great German empire there wasn't even one single good male engineer. Hear me out, i can accept the design that the replica, which was made to defend, she was made with an similar strucutre to an female, tall, and thin, which makes for an faster mobility, but why should all of the other models be female? I want to hear your thoughts. If you know more lore, which explains this aspect, I would love to. I mean no negativity.