The problem isn't limited to engineering hires, ever bought a house and had to go look for a builder to check the house is in good nick? What about the lawyer y

The problem isn't limited to engineering hires, ever bought a house and had to go look for a builder to check the house is in good nick? What about the lawyer you use for the conveyancing? How about an accountant to do your taxes? Further, how do you define who is the best? Someone who does a so-so job in a short amount of time? Someone who checks every possible decision branch, explicit or implicit? Someone who writes code in a clever way. You're only ever going to see the skills you understand. Anything that you do not understand you will miss.