I get your point, but I don't view it that way. I view it as what the client/storerfront offers themself.But you can still get the game and mod. It would be a threat if the game was exclusive to game pass. I don’t mind game pass until they start doing Shit like that. Openness of pc means options and game pass is a great option for situations that suit some people. Contrast with EGS, they took away all other options.
For all we know, game pass PC delayed the Steam version of Echo Generation.
I know that Steam is one of the easiest storefront to publish your game on, so I don't know why that game is not on Steam yet.
I mean, even Gabe himself have called EGS "great" and Im fairly sure it is because it doesn't limit peoples access to edit games. We know that Valve is all about the openess of PC gaming, which PC game pass is not about.