That's like saying, "Mothers have little to do with bringing children into the world, except carrying them for nine months and birthing them."
There you go again, completely missing the point.
Instead of lobbying your Congressman to pass a constitutional amendment banning abortion, or supporting someone like Giuliani who'll nominate justices who'll overturn the ruling, you want a President who'll magically wave a wand and eliminate all abortions. Another reason why the pro-life movement continues to be stuck on neutral, because it doesn't know how to fight the long-term battles.
If you think that Presidents have power over the legality of abortion - why is it still legal?