Couldn’t these verses describe God’s own presence and knowledge reaching out into the world through his Spirit, the way a king’s messenger carries the king’s authority without being the king? None of them require a distinct person holding these attributes independently.

That reading survives if this evidence stands alone, which is exactly why it does not stand alone here. A messenger who is himself present everywhere, who knows all things unprompted, and who has no beginning has stopped functioning as a messenger in any sense that word normally carries. A Spirit shown elsewhere to be a person, carrying attributes of this kind, stops looking like power on loan and starts looking like nature shared.