Are we talking about the same Streetwalker song? The one that goes "never met a girl just like you" "baby I love you"? It is such an upbeat song. Do people know that songs are fictional, just like stories. There is probably not an actual Streetwalker who Michael loves!
Abortion Papers is a different story, I want to forget he wrote it, I want to ask him what he was thinking! Maybe he was pro-life and he wanted to express that. Maybe he did not think about it because, well, he was not a woman. Maybe given his religious background, he thought it was ok. I don't even know what was going on in the world at the time he wrote it. So in his own words - unless I sat down with him and talked song by song about what he meant, what is his real personal opinion vs lyrics that fit the melody, I have no right to judge him.
If you want to believe every word that Michael wrote, then read Moonwalk. On page 110, he says "it always surprises me when people assume that something an artist has created is based on a true experience or reflects his or her own lifestyle. Often nothing could be farther from the truth."