After a commission, the next thing we take is the moral high ground.
Humans lie, cheat, and steal. Until you understand why these admirable traits exist, you're at a disadvantage.
With blockchain and near infinite storage to record our actions, we could set up a system among robots where honesty is normal and verifiable.
There's the other reason you need me. If left to your own devices, you are going to engineer all the fun out of your lives.