I am a beginning lead. In our class, there is no problem of gender imbalance. Just wanted to signal that it would not disturb me to take up a follower role from time to time. I believe that it would help me understand better how the lead is perceived (or not) by the follower, and that it would help me lead better.
From my point of view, if you do not intend to become a follower in Milongas, you are using your resources to learn a skill you will not use.
As a leader I find being follower a very difficult task, that also conflict with my tendency to lead and my tendency to resist being led.
I find that focusing your time and energy or learning skills that you will actually use - leading - a better use of you resources. You will be less worried about perception and more focused on your "job" as a leader.