Men and women are different yes. What is it that you mean by strong and able? What do you mean by weak and useless? Sometimes partners may be weak but they build each other up. Of course, in general women seek men who are strong because our society conditions us to organize ourselves into the roles we play as males and females, and this probably stems to our history of hunting and gathering. However, the modern world has changed. We don’t need to hunt and gather anymore because we have large-scale farming systematically across the globe. We can order almost anything and have it delivered in 2 days, sometimes less-especially if you live in a highly populated area. We have computers that have oversimplified our lives and given us infinite data to process.