This have not to be so, and it is something that needs to change in order for the pleasures of clothes-freedom to be available to as many people as possible. Young people who have looked into nudism and naturism or visited nude beaches are often dismayed to find relatively few in their own age group. Many most? Yet there are reasons why one might expect young people to be more inclined to tolerate and have an interest in nakedness than older folks: Being naked is pleasurable and fun - and young people especially like what's fun.
This is terrible. One wonders if foul play were involved. She sounds like a person with a purpose, which suggests suicide is unlikely. On the other hand, depression can strike anyone and can lead to suicide. Depression is treatable though. France has a pretty good medical system. You'd think she would have sought help if she were depressed. It would be worth asking if she had any history of depression before writing this off as a suicide IMO.