Jon, clearly you know nothing about janitors and you're letting your own disdain for them cloud your mind.
Some of them might not have much formal education, but many of them are among the most intelligent people I have met. They also tend to be honest, independent, hard-working and proud of their work.
Many of them are immigrants who are working as janitors as a second job, so their children will have the education to get "better" jobs and have an easier life than their parents. In some cases, their first jobs are highly skilled.
For that matter, janitorial work requires a wide variety of skills and training (most of which is on-the-job). An active mind is also a requirement.
Most of the janitors I have known are treated with respect by the people they work for - often even with genuine affection. (Because of the "intimacy" of their work, they are almost like pseudo-family members.)
Other than poor wages, bad hours and the occasional unpleasant task, there is little to say against janitorial work. It compares favorably to office drudgery.
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