Women were not meant to be lean. that 12% or 15% body fat is not a place a woman's body will get to without a lot of effort. I think Mark's article was spot on the other day. We need fat to make babies. I don't think the answer to thin is a hard, lean body for a woman. I don't think they are "healthier" than the stick thin model, actually. They are stronger, for sure, but not actually healthy.
I think men are generally drawn to healthy bodies which means some fat, that's shapely due to muscles and not in excess.
Otherwise... you are just getting lean for yourself. I guess it is a worthwhile goal to some, but don't kid yourself and think you can look like 12% taking steps that are positive to your health.