When i tried looking up studies regarding this i found it very difficult to find any decent studies where they actually measured the real-world performance of teens vs adults. Often studies are brain-scans (unclear what if anything that tells us) or it doesn't actually measure how smart the teens of the study were.
https://www.scientificamerican.com/article/the-myth-of-the-teen-brain-2007-06/
I did manage to find a 40 year old study evaluating the abilities of teens to make medical decisions and they did not find much difference between 14-year-olds, 18-year-olds and 21-year olds.
https://sci-hub.se/https://doi.org/10.2307/1130087
Unfortunately the sample size was too small to get great results but this is still a decent indication that adults are not much smarter than 14-year-olds when it comes to medical decision. When looking at the medical decisions adults generally make it becomes very obvious that most are very bad at it, they havn't become much smarter since they were young teens, often people become dumber as they get older.
I suspect that authorities don't want to study this properly because adults do not want to find out that they are not smarter than 14 to 18 year olds.
We also cannot trust doctors since they are there to please ignorant politicians elected by ignorant voters (and often supported by special interests) and ignorant patients.
In order to properly make medical decisions you need to put effort into it (such as reading the full texts of various trials) and most people are not going to do that.
https://www.scientificamerican.com/article/the-myth-of-the-teen-brain-2007-06/
I did manage to find a 40 year old study evaluating the abilities of teens to make medical decisions and they did not find much difference between 14-year-olds, 18-year-olds and 21-year olds.
https://sci-hub.se/https://doi.org/10.2307/1130087
Unfortunately the sample size was too small to get great results but this is still a decent indication that adults are not much smarter than 14-year-olds when it comes to medical decision. When looking at the medical decisions adults generally make it becomes very obvious that most are very bad at it, they havn't become much smarter since they were young teens, often people become dumber as they get older.
I suspect that authorities don't want to study this properly because adults do not want to find out that they are not smarter than 14 to 18 year olds.
We also cannot trust doctors since they are there to please ignorant politicians elected by ignorant voters (and often supported by special interests) and ignorant patients.
In order to properly make medical decisions you need to put effort into it (such as reading the full texts of various trials) and most people are not going to do that.