I agree with a lot of what you said, but on this issue there is a great deal more involved than "raising" people's children. Even if we don't care about the welfare of children who are not wanted and who may be neglected or abused, we as a society have to deal with them. They are not hermetically sealed in a world that that doesn't interact and affect the rest of us.
I find abortion abhorrent and consider it as the lesser of evil in cases like rape and incest, however I want it to be absolutely legal and accessible because the alternative is so much worse.
I completely agree with these points.