> If you build a robot that only handles the main workflow and can't handle any of the exceptions, you're not automating anything; you're building a convenience tool. Basically, you're removing some of the labor part of the job, but still keeping the decision making part of the job for humans.

You are wayyy underselling the importance of convenience tools. Even without working out edge cases you can reduce a workforce of 100 people to 95 robots and 5 supervisors/decision makers.