Thank you very much for your detailed and clear answer as always.

I agree with what you said. Even leaving Blossom aside, anything put on the internet can be easily copied. In this respect, no such media host will offer complete privacy. But it's good that people have even minimal control over their own media.

For example, I was thinking "I may not be able to completely delete my notes, but at least I can delete the image I uploaded to different hosts if I regret it later and somehow disconnect it from my profile". If there was a feature like you said, I could upload some images like that. For most images, it's important to know that they won't be deleted later.