Internet domain name (ex: example.com) are a reasonable option for making identity on the Internet more human-friendly.
But, Internet domain names are a poor choice as the base primitive for identity.
At best you rent an Internet domain name. But, they can be lost if you don't pay the rent. They can even be seized — even if you do pay.
There are many examples of this this, but — consider Sci-Hub.
How many times has Sci-Hub had its Internet domain names seized. Numerous!