I guess "life" and "choice" are just references to things that the respective partisans bring up when arguing. Which would imply that my argument above is wrong: it's not about accurately describing a social situation, but about giving an argument a short name.
Which has a problem of its own. It's limiting. It implies that if you're against abortions, then that's because of the validity of some "life" argument, or the invalidity of some "choice" argument. Over time, it probably makes the debates stupider.
Why give names to arguments (pro-choice, pro-life)? Why not just say pro-abortion, anti-abortion? Because you want to appeal to peoples' preexisting biases? If that's the case, it's a bad attitude towards debate.