The spectator seats at the training ground were actually built temporarily out of the venue's green materials, so it was no big deal if they were destroyed.
Moreover, the spectator stands had only been set up today because the school's faculty and students were going to watch a Third-turn Cultivator duel, so the academy created a viewing area using the battle training ground's map modifiers to give everyone the perfect viewing angle. Now that the spectator seats were gone, everyone would have no choice but to watch from a distance on the ground.
However, after the previous three encounters, the venue's built area and forest zone looked little different from being flattened by a bulldozer army—the buildings and plants had all been cleared by a Spellstorm, and there weren't many obstructions to the view, so the quality of viewing from the ground wouldn't be much worse.
