It's "quite common" for people to be fatally electrocuted while changing lightbulbs, people are very careful when doing so and some people refuse to even do it because of the danger. In reality, in this country there is apparently only one documented case of it ever having happened and the rest of the world isn't much different. Beware of "common sense" especially where politics, moral grandstanding and class envy are thrown into the mix!
Yes and on one hand a 4x4 can potentially do more damage if it hits someone, but at the same time the driver is more likely to see the person stepping out in the first place. I don't see there's any significant difference between the types of vehicle overall and none of us can do anything other than idly speculate, which seems rather pointless when you're talking about fine detail, small differences and a tiny number of cases, all based on speculation.