he wants to bring something from Unity like scripts, nodes, models, etc to another game engine when in reality that none of those things work without Unity. A programmer should not rely only in one program, if anything it sounds like he has something that allows him to build the game without coding which is only something many "programmers" do to make a game.
Plus no this is not Hysteric, remamber when Unity sucked being a browser and it took years for Unity to do something. That is the same fate your game engine spyware is going, into the list of block programs. Your time to build games in Unity will be wasted, your money will never return and many people will give up game development because of your crazy theory of Unity not becoming spyware when Unity itself knowledge the companies bad reputation.