The important, dramatic battles in early video games were against characters that held authority over the other characters. Several examples are mentioned in the discussion in the link, but think like King Koopa, classic example of a "boss", he ruled over all the enemies you face in the original Super Mario Bros.
Outside of the video game context, boss, is common parlance which refers to your superiors. Your manager at the grocery store you work at, for example.
Basically, an early video game tradition that stuck. Even if the main enemy in a game doesn't hold a "boss" occupation, it's still referred to as such.
My inuductive reasoning was what prompted me to ask in the first place... after all.... in the games I'm familiar with the "Bosses" weren't anyones employers.
If your inductive reasoning was working competently, you would have figured that the name likely originated in the way described, and if still unsatisfied, googled the result. That's how simple it is.
Idiots are incapable of learning reasonably by definition. That's what makes them idiots in the first place.
But you can't present color to a blind person. You were just presented the answer to your question. Terrible analogy. A better one would be: "I shamed someone for repeatedly asking for the name of a museum exhibit, despite the name of the exhibit being clearly printed on a placard two feet in front of them."
I just want a more substantial explaination than: "Because they are Bosses."
Why The word "Boss" specifically ?