There are two things working against young drivers: inexperience and immaturity. To the extent that you can give teens more time to develop their driving skills and the judgment to counteract their lack of experience the better.
Yes, men drive more, but our studies show that they're by far the riskier, more dangerous drivers.
There is a misconception that older drivers are somehow a menace out on the road, and that really is not borne out by the facts. Thirty-year-olds kill far more people on the roads than 70-year-olds.