Here's a surprising fact: GDPR gives you rights to access, correct, and erase personal data, but no explicit legal right to own it. That matters because truly owning data means controlling storage, access, and deletion. If another company's server holds the only copy, their terms, jurisdiction, and business model sit between you and your data. My opponent will say self-hosting is impractical, and that's fair for a lot of people. But the question is ownership, not convenience. A rented locker isn't ownership just because you have the key.