I would do it if they said to, but I generally walk and hike where there are no people. I like to go in a public marsh area to hike, and hardly anyone in town likes to maintain the trails in there. This probably puts me at higher risk for lime disease, surely. Give the effects of that a read. Also I might run into a mountain lion or something. Still have never heard much outcry over people enjoying nature, which is often a potentially dangerous thing to do. And what I do, just hiking in a modestly remote area, is the tip of the iceberg on that.
I don't really know if society does care about our health in other ways as well. The gas station across my job has two aisles of junk food and soda in it. Anyone can buy any of that with no holds barred. Doesn't society ultimately pay however, when all that 'food' makes someone sick?