But how do users, particularly high profile individuals. ensure that someone isn't out there impersonating them with the same handle that uses a different NIP05?
Discussion
I can see a single identifier being useful in determining the authenticity of someone like government official or a corporate exec because those respective institutions could issue the NIP05, but for your random normie or a celebrity how would we go about determining the authenticity of that person?
The only feasible way to make that work would be if there was a handful of services issuing sought-after identifiers, but then you're falling back into the trappings of centralization.