Lianna and Rhein, how could they not see Tree Spirit's resistance? But after considering various factors, they still chose to open up a space inside the Eternal Tree, simply because there was no other more suitable place.
Tree Spirit mentioned finding a spacious ruin as a venue, which is possible, but the flow of information would be difficult to control. Moreover, every tea party features various public opinion battles. On Tree Spirit's territory, they can at least control the narrative in the first instance and secretly guide the direction of public opinion to seek benefits and avoid harms.
Rhein's explanation this time was very thorough. Although Tree Spirit wanted to argue, he couldn't find a counter-argument.
Unless he could really find a place that could showcase the grandeur of the Barbarian Cave, control the flow of information immediately, and accommodate a large number of people.
