Isn’t this more or less the gist of GDPR and “right to be forgotten” laws? That my personal data doesn’t automatically “belong” to anyone else just because I entered it onto a server?
> If someone has access to your laptop and downloads their photos onto it, who do those photos belong to?
Rights to creative works, unlike personal data already has rather well functioning legal frameworks. The author of a creative work doesn’t give up any right to the photo without very specific circumstances.