Well you haven't said anything i disagree on. Except for the last part in bold. Moreover, she grew up with military. She didn't just learn some martial skill. Her father treated her like everyone else. That means, she is a soldier who chose reporting. She has been training as long as or longer than batman. So, her being able to be a fighter wouldn't be much of surprise.Harley might be gymnast. Doing flips in fight, that close quarters combat will be stupidest thing you can do. So, lois takes it. Moreover, she would have needed to take a break for her medical practice. Lois is, was and always will be lady action. Both silverage and goldenage had her be that. She was always in the middle of the action. She never took breaks and was always getting into and out of trouble.As for being homogenised,true it has weaknesses. But, it has also strengths. How? A world where anyone can take anyone is much more complex than a clear hierarchy.