What good will come of having the government "ban it by law"?
The same good that comes of the government banning murder, bestiality, and polyamory by law. It gives people a strong disincentive to do those things.
Abortion and artificial contraception have been traditionally illegal for the vast majority of the history of Western civilization. The only reason they aren't today is the technological revolution of the 1960s (the Pill) and the moral and social collapse that precipitated it. Our culture has been in decline ever since.
It's time we wrote off flared pants, love beads, legalized abortion, and artificial contraception along with the rest of the bad investment that was the Age of Aquarius. As a culture, we need to wake up from the bad cultural dream of the 1960s and '70s and take up where we left off in 1962 — or, better still, in 1462.