I think it can be very beneficial for leaders to learn to follow and followers to learn how to lead. Exposure to the other role is good for learning what the other person might expect from you. I think both come away with more of a respect for the other role. I don't think one role is necessarily easier or harder.. they both have unique challenges to them.
When leaders learn to follow, it makes them more aware of the necessity to be clear and decisive (but not pushy or forceful) in their movements as leaders. It also teaches them to be more patient and to give the women time to finish their steps.
I would be interested to hear what women learn about following by learning to lead. I know that some when I have talked to say that they did not realize how much women depend on men for their balance. They also learn that it feels very uncomfortable for leaders if the followers are guessing or fidgeting during the dance.
I am sure there are many more things that could be learned by switching roles.
Of course, there are other reasons for followers to learn to lead, other than becoming better followers. They might just want to learn to lead because they think they might enjoy it and we often have more women than men, so it would be a chance to dance more.