It's an interesting aspect of human nature to maintain contradictions in the same brain. Latter-day Saints are taught to value moral agency very highly. But humans in general tend to try to enforce their own practices on others (see Daniel and the Lions Den, also Prohibition).

There will always be those who try to leverage people's human frailties into political advantage. Sometimes it's a real challenge to live a principled life. Indeed, it seems rare to meet people who hold to principles even when the principle appears to work against their own self interest in the moment.

Obviously, moral agency in the extreme can lead to anarchy. Libertarians must always thread the line of figuring out the minimum amount of regulation that protects society just enough without infringing on the individual too much. If you want a libertarian to vote for your law, you have to convince them that it prevents a serious threat to enough important individuals to matter. You have to tip the scale on the contradiction in their brain.