Iq doesn't matter really. Everyone has a skill. For example I had a coworker who when hired was in a dark time. Not to give any personal details but he lost his job, his wife left him, she took the kids all in like 3 months. He came in and plainly said I don't want to think, I don't want to solve problems just just give me a machine and tell me how to run it and it will be run.

He was the best damn coworker I had ever. He beat my record of work in that machine by about 150% on average, his record was something like 3x my record. Now if the machine gave an error he would come get me and tell me to fix the error. He didn't care how the machine worked or what was happening, he came in, made product and went home. He was insane at it. He didn't want to think, he didn't care. That's someone else's job, I just run machine. He probably made more profit for that company then any other 2 people combined.