Doesn't mean they need to require a google account to provide that info though; It definitely costs more to maintain a good privacy portal, which is probably why the companies I've seen do it either list an email address in their privacy policy and handle it ad-hoc, or they use one of the P/S-aaS providers that handle the portal ( and the concerns with owning the data for the types validating documentation people provide )

> It definitely costs more to maintain a good privacy portal

It costs them more to do fraud and abuse prevention than to run a customer support system that happens to hook into google3 (because that's what it is - if you click 'remove result' it just puts it in a queue for review. The privacy portal at myactivity.google.com/results-about-you is just a way to check on the status of your removals).