the walls are thicker. everything is reinforced. external structures are bolted more securely. why is this a thing? taiphoons and earthquakes, is why.
if you like solid construction, there's plenty of it in taiwan. also, 101 is a flagship building. an item falling from the facade would kill someone or be a huge embarassment. this is not something they would let happen. just some local context fyi. that said, i wouldn't trust my life to those external structures either, but you do see alex testing as he goes.