Unfortunately common sense is not a requirement to get a job these days. They can train just about anybody to do a simple task where the rules and specifications are within reach of a computer key. If what you need is not clearly written it either doesn't exist or is unobtainable.
A few weeks back I called a company that claim to be the biggest fastener supplier in Australia. I was ordering a variety of regular sized nuts and bolts, it was a struggle but we were getting there. That was until I ordered 20 x 1/2" UNC stainless steel nuts. The young lady said "We don't have 1/2", will 1" do?"
After giving her my address she said "Are you local?" I said yes I Cue I am so she charged me $9.95 freight. After a few days I called to see how my order was going. The guy said "We can't get it to Cue for $9.95, I'll have to charge another $20." I said no problem and gave him my CC details. A week later I called back and got the same girl, I asked how my order was going. She asked who she could send it with, I said Star Track or Toll would be best. I called back in a few days and she asked "What's the number for Star Track?" I said 132345, I think she wanted my account number but they'd already taken money for freight so I gave her the phone number.
My bolts and nuts ordered on 2nd January turned up yesterday all correct.
Imagine the trouble you'd have employing somebody if the job required mechanical aptitude, technical skills or just common sense.