It's a pretty big stretch to generalize from your particular example, Google as a credential provider, to private internet firms altogether.
In the case of the Google login you're actually right. Once you get booted off it you'll have a problem. But this doesn't hold for all private firms. If you get kicked off Twitter you're just kicked off Twitter, it doesn't impact your ability to make payments or go about your day. Same for TikTok, whatever else have you.
There's a particular class of applications, identity and payment providers namely for which you can make a good case that they're infrastructure of sorts, but it doesn't really extend to the majority of digital services.
In the case of the Google login you're actually right. Once you get booted off it you'll have a problem. But this doesn't hold for all private firms. If you get kicked off Twitter you're just kicked off Twitter, it doesn't impact your ability to make payments or go about your day. Same for TikTok, whatever else have you.
There's a particular class of applications, identity and payment providers namely for which you can make a good case that they're infrastructure of sorts, but it doesn't really extend to the majority of digital services.