I think our difference is the 'random congoers decide who touches you'. Cos, I see it as 'you decide if you're open to requests to be touched, and then you decide on each individual request, if you're willing to let that person touch you.'
And, I can certainly think of situations in which people choosing to not let their body be touched could be unhealthy for them. It's not all situations, which ferret said, but such situations do exist. And, the fact that the choice the person is making is such a situation is a less healthy one than they might make, doesn't mean they can't make that unhealthy choice.