He would benefit from seeing a live performance because he would be able to view the emotions in real time instead of just reading the words on the paper. Also, a live performance might help him hear lines he missed while reading. The actions will also be more clear. He needs the essay to be as clear as possible.
Bottom is given the part of 'a lover that kills himself, most gallant, for love.' And he's thrilled to be part of it. Thus, he believed it was a tragedy.
