I don't know whether it is or (more importantly) will be bullshit but one aspect of web3 I think has been a victory to webstandards: an actual decentralized SSO

I don't know whether it is or (more importantly) will be bullshit but one aspect of web3 I think has been a victory to webstandards: an actual decentralized SSO standard. I know it must be easy to use Google's or Facebook SSO. But why rely on a Third party for this? And why - as user - must i open new accounts on all these webservice?