Kindkey4468
Yes, Aurora Store should not be used as it is insecure, dangerous and has no privacy benefit over sandboxed Play Services on GrapheneOS.
It does only cripple your security:
It doesn't properly verify downloaded apps and it doesn't have working or reliable auto-updates, potentially leaving you without critical security updates to apps.
It does not have a privacy benefit over sandboxed Play Services, as it does not avoid Google or any of its tracking and data collection, it is only a less secure "feel-good" placebo.
Apps from the Play Store bundle Google libraries with them. Those run completely independently and don't need Play Services to work. This gives Google the same access it would have if you had Play Services installed, which is not much in any way to begin with, due to the strong app sandbox.
But combined with the fact that you now also have less security and security being a prerequisite to privacy, you have even less privacy using Aurora Store than if you would just be using sandboxed Play Services.
You can do so with an anonymous Google account, created without a phone number or any PII. To do this, create it from a non-suspicious IP address, meaning no Tor or VPN, for example a public WiFi.
There are some niche valid use cases for Aurora, for example bypassing Play Integrity on app listings, to get apps that you otherwise couldn't download, but normal usage is not one of those cases and you should uninstall it and switch to sandboxed Play Services.