The point isn't what you can do as a user. The point is that Google adds more and more hurdles to running a website without plugging into the CA chain.
CA chain is centralized. Plus, it requires you to have a domain name. DNS is also centralized (although to a somewhat lesser extent).
Effectively, we're seeing yet another step in hyper-centralization of the web.
How many websites do you actually use don't have a domain name?
also, as above, there is no one root CA. you can add and remove any ca from your system. most users don't because why would you trust a random ca from some random site.
CA chain is centralized. Plus, it requires you to have a domain name. DNS is also centralized (although to a somewhat lesser extent).
Effectively, we're seeing yet another step in hyper-centralization of the web.