The Character Development of Arwen

[Kronos]

The only Hobbit who even got close to meeting Arwen was Frodo, and even he didn't even speak to her.

Frodo did speak to her. In Minas Tirith.
And the fact that the Hobbits do not speak to someone does not preclude Tolkien from talking about them. We probably get more of Shelob’s inner thoughts than we do Arwen and I don’t recall Frodo and Sam chewing the fat with her.

And I wish people would stop with this fallacy that the LOTR is told from the Hobbits viewpoint. That is a concept by Tolkien that does not stand up to scrutiny.

If the LOTR was told from the Hobbits viewpoint then the Faramir/Eowyn chapter would not be nearly so detailed. You would also be unlikely to hear the thoughts of a passing fox.