Tango is just a leisure activity, which apart from abuse, is not an area worth much protecting like health or labor. It is everybodys own task to find suitable partners. And if one can't do that in the long term, then maybe one has to look for another hobby.
There is no such thing as “these leaders” and “these followers”, at least not as something that you can influence. You have to decide for yourself who you want to dance with and how. Two “bad” dancers in your eyes can have a lot of fun together, have children and live a long and happy life.