I think too often we get caught up on "the game" and try to frame decisions solely in that context.
The reality is that sometimes in politics people hold genuine beliefs, and when it comes to the GOP I think a non-insignificant caucus of them genuinely opposes abortion for various personal reasons.
I do think libertarianism has some principles and concepts that are valuable, I would have even called myself libertarian-ish at certain points, but over the years it's fallen into a similar bucket as communism from my perspective.
It's an attractive system until you start introducing the people.