The overwhelming majority of abortions are motivated by the woman's economic situation. If good guys are out there, women will save themselves for them, and so an out of wedlock pregnancy will just produce a wedding.
As for halacha, you are right, Debbie, that there are nuanced positions out there. But are they correct? An unnuanced position (like that of Maimonides) seems to be the only one consistent with what Rabbi Yehuda Hanasi learned from Antoninus Caesar (Sanhedrin 91b).