God’s ways do not rely on the goodness of men (or women) to work. They have a power all their own. Thus, all through the Old Testament, we see God relying, not on good men, but on people who were prone to abuse, violence, weakness, arrogance and all manner of human sin to enact his plans. To put a finer point on it, any idea about how things work which relies on the goodness of humans to work, is self-evidently not from God.
To see the difference in action, consider the difference between the fruit from the teaching of the unique subordination of women vs full equality and mutual submission between men and women. Despite having been tried all over the world, the unique subordination of women has never produced a human society where peace, justice and freedom were widely enjoyed. (Anyone who says pre-1960s America gets slapped – slavery?) The explanation for this is always the same – it requires good, Godly men. This teaching is like communism, a great idea that’s just never been properly executed.
On the other hand, women in the early church served in all areas of the church. They enjoyed rights in their marriages and as daughters not allowed or expected in the prevailing culture. That all faded away after the first few hundred years, but the remnants of this teaching carried such power that the places in the world where women first gained (pretty much) full equality and are considered the most free, most respected and most empowered are places where Christianity has deep roots. Once God’s ways are introduced into the system of humanity, they will face more and less opposition, but over the course of time, they will persist and bear good fruit.