Are people really wavering in the middle, eager to pick a side but terrified of being labelled as anti-choice or anti-life? Maybe kids are deciding their position based on which words sound nicer rather than agreeing with / rebelling against their parents? And these kids already know enough that "pro-abortion" means "villain" to them?
You rarely (or never) see a discussion about, say, Trump turn into a litigation of whether it's okay to call the opposition libtards/rwnjs/SJWs/MAGAts, but that stuff has to make up more than half of abortion discussion. Is it just that people are loath to actually talk about the issue at this point and this is another outlet?