With regards to political views, the point isn't in any way to change your view, it's to use your view. By taking out ads that stoke someone's feelings about abortions, they can get them to follow a FB page, which can then in the future be used to promote other things (like specific political candidates), or to spread propaganda (like, "hey look at this fake news over here").

And thus, by association ... your views can certainly change.

> "If this person/page that I agree with so strongly on abortion (or whatever) has this other opinion over here, I should probably give that a second consideration"