I really don’t know what you are trying to say, other than more emotional appeal. It is not rational. The BGE is not a life coach. I am glad it gave you something to focus on, and that is great. Nothing wrong with that, however remember it still software. Software is a tool. Don’t turn a tool into a lover or tie it to your very psychological well being. It is no less a tool than a hammer or an email client.
I think the BGE is a great option for learning game logic for example, interacting with blender in a fun way but at the same time don’t trick yourself into thinking it is the only thing for you or that it is something it is not. It is just a software solution, a tool, a feature and it is not the only existence that does the same thing. Tools do not need your faith or religious like loyalty. It is not healthy to treat them in that way.
As for propaganda, one could argue that your emotional appeals towards the BGE is also “propaganda”, but lets be honest here. That wording is hyperbolic. There are legitimate criticism for Blender as well as its game engine, especially in the past. In turn many Blender users were going around trash talking other software, professionals, or just being religious zealots online which created a bad image.
Do you know why this thread exist? Because fanboy behavior was harming Blender’s image in the larger field of CGI. We don’t want to repeat that.
Finally, the UPBGE is separate from Blender now just as Armory is, however everyone is still in the same circles. You do not have to tie yourself to anything you think you believe the BF’s money goes into, which is this case is apparently neither thus your reaction is a bit…weird.
As for Armory, it was enough for the designer to get an official speaking role at Blender Con. That’s worth something in your eyes right?
It is not FOSS in the way you are thinking. This is from an Epic employee (former) regarding the UE4 “Yep, just to clarify, it is not technically “open source” it’s just a very very easily available source code. Yes, there is a difference”.
They opened up the code but the licensing type is still the same. You have to understand the differences in license types. Blender code cannot find its way into a non open source application like Maya or C4D, but Cycles (render engine) which is licensed as Apache can, and is found in C4D. Its all about the license.