Earlier quoted context omitted.
World of difference between, 30, 40, 50 and 60. Feels like something I have noticed between west and east coast drivers. Latter really send it on country turns and just trust the road. West coast, particularly montana, when vision is reduced, speed slows down. Just too many animals or road obstacles (eg: rocks, planks of wood) to just trust the road.
Road obstacles are static and can be seen by not “out driving your headlights”. Animals flinging themselves into the road cannot, in many instances.
I suppose we're meant to interpret charitably here, but it really seems to me like there is a big difference between the scenario described and the one you're talking about, where the deer really does fling itself out in front of you.