The thing is, Throne Worlds are distinctly a Hive creation. Mara Sov was only able to create one through her own power (which far exceeds most guardians) Eris’ guidance, and Riven that Last Ahamakara. Even so, Mara can’t resurrect from her Throne Worlds traditionally, and needs to be Re-Summoned by individuals like Eris. Furthermore, Eris herself was only able to create a Throne Worlds traditionally upon becoming a Hive God, despite practicing her own Hive Magic for extended periods of time. Even with her hand in the death of Crota, Oryx, and thousands of Hive. The Mindslayer (or whatever that Scorns name was) was only able to create a throne world thanks to his attachment to Darkness through Dark Ether, his own personal study of the hive, and his part in Killing Cayde 6. He himself had essentially become Hive himself in order to do it, thus why he was able to command hive to a certain extent. Toland is the same as the Scorn, having only been able to create a tiny Throne Worlds traditionally upon after having gone through a process where he forsake his own humanity. Just practicing Hive Logic doesn’t prove oneself capable of creating a Throne World. Chances are, the Guardian doesn’t have a Throne World, but it’s cool to think about what one could look like.