The new bill reinforces that all data brokers must register with the California privacy protection agency, and it requires the CPPA to establish an easy and free way for Californians to request that all data brokers in the state delete their data through a single page, regardless of how they acquired that information. If data brokers don’t comply with these rules, the bill stipulates they be fined or otherwise penalized.
Hopefully this becomes the standard nation wide. Having a single page where you can delete your accounts on multiple services with a single click sounds like a data privacy dream.
Social engineering will definitely be involved, but usually when you request deletion they take like a week or so to process so you have time to cancel if you'd like. So that's a bit of protection. Also I'm not sure where that "one page" is located to access all of it is, maybe some California government site. If so, then that's additional credentials the user can protect.