Why in God's name would anyone want to be a beta tester? This is a serious question.
It is a great intellectual challenge to find a bug, then find a short sequence of steps that reliably reproduce that bug. It's really not a bad hobby, if you have the time. I enjoy doing it from time to time, but you can definitely get burned out on it. Why do people enjoy crossword puzzles? Why do people like to play Sudoku?