Answer:
Because teens minds are all over the place. Adults are more careful and think wisely than teens which makes them less likely to crash than teens.
Adults are more mature than teens, they tend to make better be more obedient to traffic rules and regulations while teens are mostly immature and tend to disobey traffic rules and regulations.
Adult's tend to be calmer than teens who's minds are all over the place.
teens are more adventurous and more energetic than adults which causes them to drive more recklessly than adult.
lol I'm a teenager tho so.....
Hope this helps.
Good luck ✅.