The "central source of identity" idea is not inherently bad, and for the majority of non-techie people, might actually be a net plus. I also trust google more to not have an SQL injection vulnerability on the login page than some random little shop.
I just wish it didn't come bundled with tracking.
And then there's the risk that if google's algorithms thinks you did something naughty, you get locked out of everything.
I wholeheartedly agree with your last paragraph. The consequences of being banned/blocked by your IDP and the inability to contact customer service are both severe. Also, it seems like you have to choose wisely as it’s not clear that most websites support you changing your IDP.
I just wish it didn't come bundled with tracking.
And then there's the risk that if google's algorithms thinks you did something naughty, you get locked out of everything.