That seems like a huge reach. Most of the data that affects users can be one way or another acquired if you're logged in. Furthermore GDPR requests are often handled outside the account itself, except by companies that have the resources to automate them (and those companies usually have a lot of security resources).
I'll give you though that the addition of human processes in there present more security risks. I'm doubtful about the addition of safety risks though.
I dunno, this all seems like an extension of the risks we already have. More data, what of it? If an account with sensitive data is compromised, you're most likely fucked regardless of whether the hacker gets a hold of that data.