Wasteful but FAR more secure. Surprisingly secure. If they wanted to follow through on their promise of sandboxed and encrypted data which even they couldn’t access, this is one way to do it.
E2E encryption, but I don't know the architecture. I.e. Meta doesn't have the keys. My comment above is based on an interview I saw with Zuckerberg where he wanted to use the Signal model to ensure the data was secure "even from Meta."
