Well, without programmers we might live in like the seventies, were computers were insignificant in everyday life and even in most businesses. Still, not that bad. They had nice funk music, way more attitude, and could relax better. (And let's not even go into the sixties, who tons of people remember as a golden era).

Now, without janitors we'd be like in the middle ages. We'd have to clean everything ourselves, everywhere. The roads would be like 19th century Paris or 16th century London. The stench would be unbelievable, plus lots of diceases.