It's also an unfortunate fact that testosterone makes it a LOT easier to put on muscle mass. A good chunk of men don't take advantage of it, but the biology still holds. It's also worth noting that men are on average taller than women. Our volume of muscle is often bigger to start with.
My wife does quite a bit more strength based exercise than I do. The force multiplier on my exercise however means I can easily out power her, when it comes to brute strength.
It's worth noting however that a lot of the initial strength gain of exercise isn't muscle increase, but better control. Both men and women can increase this, fairly evenly. The difference tells most once that caps out.