It really really doesn't matter. Keep encouraging girls to do sport! The reasons for girls to do sport was never so they could win olympic gold. It was for their health and their enjoyment.
Have you ever met an elite athlete? For many (for good or ill) their sport defines them: second is only 'best loser'.
The training, the nutrition, the everything, is about WINNING: that's what it is.
Elite athletes are temperamentally different to 'normal' people - that's why they're elites. If you take the possibility of winning away from them, then it might seem to some to no longer be worth it.