I hope this clears up why I like "Average Joes" and why I think an smart Inquisitor would employ them.
It still doesn't make any sense to pick the "average joe" for the spying, infiltrating and investigating part. If you want to start a new cell and you need a "hacker" type, you are not going to pick a boy who just went out of the Informatics School and doesn't know a **** about real life and the real hacker things.
The same if you need somebody to infiltrate in the worst part of the hive and hunt some gangers down. You're not going to pick the first recruit you can get your hand upon, who have only shot targets in the trainings. You pick somebody who knows who the f*** is he doing.
I think you're mistaking "I don't believe an Inquisitor/Interrogator would pick an incompetent and naive unbearded boy for a subtle investigation" with "I want my character to be Stallone in steroids"
Give me some credit. Did I not say a Guardsman would be sent into a barracks. By the same logic, scum would be sent into an underhive. Unimpressive doesn't mean incompetent.
Trust me, my characters are not naive. They have dark backgrounds where their naive life gets smashed to splinters. My reference to certain superhero movies is not a coincidence. How much did the X-Men get their butts kicked in the first movie? Then how much butt kicking did they accomplish by the third movie? Batman was Bruce Wayne once. Spiderman started as bullied Peter Parker.