Web3 or what is meant by it is just a database in the form of a blockchain. Nothing else.
And to interact with this database, you still need a centralized server.
This is the main problem, having solved which, I believe, we could reach a new level. If browsers could communicate directly with the blockchain, bypassing centralized servers, this would take the technology to a new level.
I lost a lot of accounts because of this misunderstanding. I always use a VPN for work. I keep all logins and passwords in the password manager. But Google is very worried about my safety, even to my detriment.