Snake oil came first. By a likely ~ +50k years

Something like that is likely true when it comes to the record in formalization.

engineering is born out of middle ages bombmakers for warfare. The original bombs came about when gunpowder finally appeared in the west. 

then the dangerous job of the bomb maker or 'engineer' arrived as a descriptive. He makes engines. Engines of war. (devices of war)

The term 'hoisted by his own petard', is in reference to engineers who blew themselves up.

"Two very different things."

Like you said, I indicated and never called it that at all. So it is difficult to be as what you might be saying I said, as I said no such thing.  Perhaps yours is a general remark?

As for the shaman being a professional or not, we can’t really argue that in any sensible fashion. No point.

True story. I accumulated the most demerits in Air Force ROTC in the history of the U. Maybe in the history of ROTC, who knows? I guess some people aren’t cut out for that kind of professionalism. Besides I found it quite difficult to accessorize with that dreadful blue gray color.

"engineering is born out of middle ages bombmakers for warfare..."

Maybe English word "engineering". Not engineering as constructing/inventing something.

Very much a case of inventing and constructing. The engine maker of the war effort. The word and it’s meaning as an origin point.

In modern parlance engineers don’t invent. They build by the book. If inventing -- that’s science. It can be easy to mix it up and mis-name it though. People do it all the time, so much so that the thing is a bit confused.

I’m not saying that engineers can’t be creative that they aren’t, but in modern parlance, the two are separated into science (theory and original creation) and build by the book (engineer)(which is enabled by the theory and original creation). Engineers search for solutions all the time but they don’t build a bridge based on a theory. 

Scientists, on the other hand, don’t build bridges. Thankfully. Not sure I want to be driving or walking on a bridge built on a theory.