Thaumaturgy and Theurgy, Why aren't these terms used? Options

With all the bickering over terms (magic vs magick, high magic vs low magic, etc) why can't people simply use thaumaturgy and theurgy? Miracle-working and god-working. I mean really, how hard can it be?

//end pointless rant

I think regardie uses the term theurgy in his books, when he means high magick.
But i think high magick can be a broader term than theurgy.

I'm aware of this. The excessive labelling and distinctions are what I'm starting to find tiresome (and I'm not even all that active in the "magical community," as it were).

Try to look at it from the standpoint of Kabbalistic nomenclature. One either works toward practical results (thus Kabbalah Ma'asith) or towards contemplative (or enlightenment-oriented) results (thus Kabbalah Iyunith). This is the basic line of demarcation between miracle-working (thaumaturgy) and god-working (theurgy).