That'll never happen for two reasons, decentralization means a user-driven internet. It has to, even if corporations have the freedom to join, decentralization

That'll never happen for two reasons, decentralization means a user-driven internet. It has to, even if corporations have the freedom to join, decentralization by default means any private person can host a part of it. And when users host things they give of their own resources to other users, which means there is trust involved. And whenever trust is involved we need a better insight into who signs up. For example; request access with a bio, or a donation. The other reason is that what you describe is centralized authentication, to a decentralized backend, so it defeats the purpose. Who owns the authentication? If we want freedom from a corporate internet, we'll just have to bite the bullet and accept a certain learning curve. Which is also why the centralized corporate services will never go away, and most likely remain a majority.