The birth control debate

Something that has been weighing heavily on my mind lately is birth control. Funny, since I'm not even on it anymore (my form of birth control was a vasectomy). But with all the bickering back and forth about abortion, why are pro-lifers spending more time and money and research efforts on better birth control? Wouldn't that make more sense that spending all their time and resources picketing abortion clinics and harassing the women who are utilizing these ((legal)) services? If we had better birth control, we'd be able to avoid more pregnancies, which in turn...would lower the abortion rate. C'mon guys, say it with me: lower the abortion rate.

Why is it that we choose to fight when the resolution is so simple?