What about data that Facebook generates about you, but you did not provide? Is that information required by the GDPR to be provided to you, or does the GDPR only state that any information you provided to them must be returned? There's no way I'm reading the GDPR nor would I even understand all of it if I did.

We know that FB makes connections between you and other users even if you've never made those connections yourself. We've heard about the shadow profiles, etc. These are all data points that FB generated on their own. It seems like this is the information that is valuable. Information gleaned from ML analysis of images posted would also be their own. That has way more value than the image itself would. FB is doing way more under the hood than just slurping in the data users posted, and then displaying it back to them.

It doesn't matter where the data came from - uploaded, downloaded, generated. If it is PI it is the property of the identified user, not Facebook's. If they slurp 100 images of my face then that data is mine and it is my right to have it deleted and told who they shared it with and for what.

Does anyone have an explanation as to why parent is downvoted? Is the information they presented incorrect?

Possible reason: It is actually intentionally avoided to use the concept of "ownership", since those advocating for "data ownership" generally mean things like "if people own their data, that means they can give it to companies and then that company can do what it wants with the data, since it is its property", which is more or less the opposite of what the goal of this privacy regulation is. The term is used sometimes in more general material, but it is problematic framing. People have rights to their data and how it is used, but they don't derive from ownership.

So in that particular sense, it is even stronger than ownership, at least in terms of preventing facebook from ever becoming the owner. (Not in the sense of having all of the rights usually associated with ownership, which include selling)

The article linked doesn't back up the claim that GDPR makes the user the owner of the data companies collect. Being entitled to obtaining a copy of a company's records about the user is a very different thing than making the user the owner of that data.

I'm not finding where in the GDPR text the user is stated to be the owner. The text frequently refers to the user as the "data subject". Ownership is not mentioned. The article you link to claims that the EU resident owns the data, but never backs up this claim with references to the GDPR text.