I updated my post to clarify what Steamworks features mean. We don't have any interest in "lying" to you and merely want to give you as many options to play the game as possible.
I sincerely believe that you have no intent on lying, but this has been a huge miscommunication.
Seriously, I love you guys and have played every Divinity game up to this point (I even own 3(!) copies of Divinity 2 and 2 copies of Divine Divinity; I think that says a lot

)
I shouldn't be even bothered (I use the Steam-Version) but somehow I am really bummed how this played out.