Right, but the key word here being “usually” - if I can’t just run the test three times and assume 2/3rds of the time it’s good, how can I know it usually works

Right, but the key word here being “usually” - if I can’t just run the test three times and assume 2/3rds of the time it’s good, how can I know it usually works in production? Is the right solution really to throw up your hands and not test end to end ever? I guess the argument is more convincing if it’s not that it’s impractical, it’s just too expensive relative to the returns.