My understanding is that this only works if you're using their centralized PLC DID, which I think only works if you sign up through their website? Maybe I'm mistaken about that or they removed that restriction, I don't see any mentions of that in the docs today. Users using the `web:` DID need to use the .well-known resolution system predicated on owning a domain name and their identity is tied to that domain name.
In general, I guess I'm just pessimistic of the ability for any DID system to exist that isn't either centralized or majorly user-unfriendly. I think that reasoning on a "local scope" like ActivityPub does and worrying less about global identity is just a better long-term solution for users and works better with how people are practically using social media today (think about the proliferation of a million discord servers each with effectively their own user identity....)