[baddox]

> Usefulness of the definition: Aircraft which are the size of a van and shooting rockets at brown people in the middle east are also called drone. Since capabilities, dangers and use case

And yet, in that very argument you used the word "aircraft" to refer to military UAVs. That word "aircraft" is also used to describe vehicles of vastly different designs, sizes, and capabilities, but I don't think there's much confusion caused by this term.

It's okay to have words that describe large groups of things, along with words which describe more specific subsets of groups of things.