Of course some do reject the premise that we own our own bodies. Some claim that God owns us, since he created us.
At such an axiomatic level, I suppose it would be hard to make headway.
If God created us than we must answer to God, not government, for our actions. This sort of goes along with the founding of the United States, taking away the ‘divine right of kings’ as was the case in europe, where it was said God ruled through the kings giving them near infinite power over the people. In the US it was said you were ‘king of your castle’, and God worked directly through you, cutting out the king as middle man. I think many opponents of liberty misplace a desire for liberty with perverse desires for drugs and so forth, a lot of it also has to do with the strength that one gains when one falls.