Naturists typically think that it's good to have a kind of body positivity that isn't built around sex, and to see all kinds of bodies at different stages of life. Rather than having to compare themselves to just young, slim, airbrushed bodies in sexual poses.
I get that I really do and think it is a beautiful sentiment but I don't find it pragmatic as a rule (but entirely based on my culture and life experience admittedly). I am fine with going to clothing optional beaches and I wear a bikini because I am not comfortable with people I don't know seeing my body nude (regardless of whether or not they look). Being in the presence of an unknown nude child would evoke great despair and discomfort for me.
Helping my mom bathe my great grandma and helping my grandma post surgery as a child and having them bathe me makes sense, showers/baths with my dad stopped at about 5yrs old (when I asked the dreaded question) and all of those innocent interactions that occur in a loving family dynamic with innocent purpose are understandable and expected IMO. What I don't get is family recreational nudity and nudity around strangers.
In regards to children I stand by what I said, respectfully however, if I came off judgmental my apologies perhaps I should have said it isn't appropriate in the US and from what I understand it isn't appropriate in the UK either (am I misunderstanding?).
Traveling overseas is awesome but very expensive as a US resident citizen so I have had limited opportunity to travel overseas beyond work trips. Respecting customs and 'doing as the Romans' is exciting and new but that stops short of nudity for me as a personal preference.
This (the concept of naturists and cultures with similar perspectives) is quite an interesting discussion.