I think this discussion is going way out of hand. Games transported always a political agenda, as humans (and game makers are such last I checked) are political beings, and their opinions and views on the world influence their work, especially their artwork. Even if they don't intend it, that happen unconsciously. There were always lots of historical games, did the game makers side with one side of the conflict? Think about World War games, did games like say Wolfenstein side with the Nazis? Isn't that already a political agenda? Naturally it is, but as Nazis lost few people are on their side and are in result upset about such a game. Think further. Do you know games, in which you fight against islamic terrorists or russian spies? Politics right there. Even games that have nothing to do with the real world reflect often aspects of the our world and take sides. In many games you fight for the good against evil. And the game devs decides which side is the good one and which one the evil one.
So, games are political, so what is new? The difference today is, that some (and I say some) game devs use that more conscious and make their game design decision more conscious about politics. Also they often include now political themes that are more polarising than the examples I brought above. Most people can agree Nazis are evil, but not all are on board with the depiction of say homosexual relationships in their games. I think it is a good thing per se, if games are able to reflect more current discussions. All artforms are part of current discussions in society, and it is good if game makers realize that and seek actively to participate. Result can be a game like 'This war of Mine', which shows war from the side of non-combattants and can move your viewpoint on things you thought you knew your stance.
So can it be bad? Sure it can. As always there are good artists and bad ones. And the bad ones are often less subtle about their message than they should be. A good art message makes you think, it does not say: this is the right stance and you have to accept it. So it is not about political or unpolitical games, it basically is a discussion about good or bad games. And yes, if MS/Sony/Nintendo put out bad games it will influence their success.