I don't think I implied there could be no downsides to weigh up. But I do't buy that adults should be completely unable to even try them to solve their medical

I don't think I implied there could be no downsides to weigh up. But I do't buy that adults should be completely unable to even try them to solve their medical problems, but can get wasted on alcohol and literally kill themselves and their family with cigarettes just because they feel like it.