It alway killed me, when interviewing prospective service dept. employees for our N/C machinery manufacturing facility, how many office types thought they could master the position when it was obvious they had nowhere near the skill level to do so. Many touted their vast "experience" at managing groups of people in associated areas, but were unable to answer the simplest of technical questions, were they electrical, mechanical, pneumatic, or hydraulic.
I always thought it was a "generation" issue because most of the truly qualified applicants were older but soon revised my thinking when I found a source of people willing to learn at the local Junior College.
I can guarentee you the answer: "Simple. You're not smart enough for maintenance" is not necessarily out-of-line.
dennis in nca