I hear stories all the time about how hard it was to find a sober person to drive them here or there. To my knowledge, the teens who were killed were not under the influence of alcohol. Speeding is the driver's choice. Many people, of all ages, speed. If laws restrict the speed teen-agers can drive, the laws must apply to the whole population.
Many people think all teens are bad drivers.
No one is perfect, so that makes no one a good driver. Some may be more cautious than others, but that doesn't make them perfect. Anyone could get in an accident. There are so many things to learn from listening to people. There are also many things that must be learned from experience.