Well, the area where I live doesn't have either.
I grew up in a state, by the way, that had a high population of bears. Thankfully, though, the area that I lived in had no bears and no rattlers (which were frequently found just a couple of counties away).
I can live with the random rare sighting of a mountain lion, bear, etc. When they become common in the area where I live, though? I will start looking for some other place. I may be descended from pioneer / mountain man stock, but any desire to encounter wildlife that is capable of doing me harm missed being passed to me...
I have been fortunate in finding my little "islands" free of most such creatures. The last place I lived DID have the water moccasins, but none of the other creatures on my NO-WAY list...