It's the absolute opposite of skewed. It's fair and representative. If a country needs XX TWh/year, this is exactly how many deaths will be caused by the various production methods.

You car analogy is on the other hand completely wrong: the death/HP is a meaningless indicator. How about deaths per mile travelled? Check out the values at https://en.m.wikipedia.org/wiki/Micromort which has a section for traveling (named Additional)