He says in the lecture that physicists arrived at the simple representation by studying Feynman diagrams and looking at how terms cancel each other. And amplitu

He says in the lecture that physicists arrived at the simple representation by studying Feynman diagrams and looking at how terms cancel each other. And amplituhedron also gives rise to those same representation. This is the reason why he considers amplituhedron to be a good research path. He cites similar interpretation change that happened before in physics[0] [0] : https://youtu.be/sv7Tvpbx3lc?t=2664 https://youtu.be/sv7Tvpbx3lc?t=2664