It's the more exposed thought process that shines a strong light into your mind. It's not just what you do but the why.
It's no wonder collecting this info is a priority. It will be a goldmine for dataminers with the right correlation. Sure right now it's not collected centrally but I'm sure sooner or later there'll be a quick "just click off this tiny T&C update before you continue" crossing our paths.
Also, it means that this confidential info is now in more places than one. It's no longer sufficient to encrypt a file and lay it on a usb stick in the safe.
And it's also there in centralised place ripe for the taking. Not even any need to scan the system to find valuable information.
Who argues against users taking responsibility? The users who demand exfiltration protection around the Recall DB? Or the commenters who maintain that extra protections are pointless?