The reason scientists say animals stand in front of cars is because they simply haven't evolved (or were created, whichever) to deal with a fast-moving object like a car. In some ways their brains don't even register it. It'* sort of like the fact that small kids don't recognize that a big car moving towards them is dangerous. It doesn't mean they are stupid, just that they don't understand it'* dangerous and in some ways, can't even see it.
Eventually the animals will evolve to be around cars because the bunnies that get hit one too many times don't live to pass on their genes
In any event, if you're not going too fast and you have time to do it, you should slow down or swerve just a bit to avoid an animal. If it'* going to endanger yourself or others, then you should just hit it, but a lot of the time you can slow down enough that it will move out of the road.
If you do hit an animal, you shouldn't just leave it there. If it'* alive, then either put it out of it'* misery or if it'* a pet, take it to a vet and have them treat it or put it out of it'* misery if it'* just hurt too bad. Inconvenient, my *ss!!! If that was your dog in the road, wouldn't you want a good samaritan to take care of it?
And even if it'* not alive tou should move it off the road so the scavengers don't get hit too.