While this is true, it is also true that banning them will not keep them Catholic. And it will not encourage them to raise their children Catholic.
How in the world do you reach that conclusion? Based on your commets, it appears you are not Catholic. I'm a Catholic woman raising my kids Catholic. Not serving as an alter girl did not run me off. Letting alter girls in would.
I reach that conclusion by knowing many women who were raised Catholic who are not raising their children Catholic. Ask your parish priest about the phenomenon, I'm sure it's not an unfamiliar one to him.