You ignore the fact that most abortions are done for health reasons.
BWAHAHAHAHAHAHA
By "most," you mean "less than 1%."

Nonetheless, birth control DOES fail and its still the business of the owner of the body that is pregnant. ONLY.
Birth control only fails in the blood lust frenzy of pro-aborts. BUT on that 1 in a million situation that it legitimately failed, RU-486 can stop the pregnancy before life, before the brain and heart develop.
There is ZERO legitimate reason for abortion.
Its simply none of your business.
A woman who is an illegal that I've never met is raped. Is that "none of my business?" Let's say you Communists assassinate Clarence Thomas, and Obama appoints another Marxist to the court. Then the court rules that rape is actually a right found in some undisclosed portion of the the Constitution. Chief Justice Ginsburg declares a right to gratification that was never found, so SCOTUS creates law mandating rape.
Is it "none of my business?" If our Dear Leader mandates that employers must provide knives and handcuffs so that employees can rape, is it none of my business? If the Khmer Rouge attempts to force churches and religious businesses to fund rape, is it none of my business?
What this boils down to is that you believe people are property of the government, that the government decides and we obey. I say "no," that we are a free people and that WE have the authority over the government. This is a divide where no middle ground will be found, you totalitarians and we libertarians will not compromise. You will advocate for dictatorship and I will advocate for liberty, that's just the way it is.
As a free man, it is my business what our society does. There is no rational reason for abortion. You of Khmer Rouge promote abortion mostly from a standpoint of greed. Hundreds of billions go into the pockets of abortionists and their support staff each year. The primary motive is simply money. A $10 dose of Plan B stops a $1,200 abortion, so naturally you work against the rational use of birth control, there is no money in it for you.
And as others have pointed out, its legal.
MYOB
Lots of things are legal that you attack. Even Christianity is legal, yet you do all you can to end it.