Said another way...

If it is safe and legal, why should it be rare? Why should it be any rarer than necessary? Why shouldn't it be exactly the same woman's choice as to how many abortions she wishes to put herself through? If it is legal and safe, why would you pass judgement on women for whom it is still the preferred method of birth control?

If, as Amos suggests, it works for population control, then why rare? Why not as many abortions as it takes to get the population under control?

Why rare? Why is it evil?