Well let's all be honest, in the end it's a result of GOG's user base not actually giving much shit about DRM free - maybe we are vocal, but not when it really counts.
Most people are on a stance of "Well, yeah, DRM-free is nice, but when I want a game, and it's only on Steam, I'll get it there." Many made an Epic account for the freebies. And how many of those stayed true to their initial intention of "only the freebies, they'll never get money from me"?
Only a tiny fraction of users actually goes through with it and buys DRM-free exclusively. If there was a majority of DRM = no buy users here, GOG wouldn't have done this.
We ourselves are hypocrites, when we cheer to FCKDRM and then go play our Skyrim, GTA5, Civ 6 or Red Dead Redemption 2.
I guess Galaxy 2 showed GOG how many people have accounts on all these platforms, essentially showing them how little we care about DRM ourselves.
I upvoted you but can't say I'm a fan of that collectivism sort of approach...the way I see it it's simply the "fault" of the individuals who did that, not "us" as some nebulous whole. I can say I've done my part supporting GOG over the years and anti-recommending Scheme to people. Folks on the forums have gotten tired of me criticizing Scheme.
I feel like I can't trust GOG at this point. Maybe I will "hold my nose" and buy a Resident Evil or another Silent Hill if they have a DRM-free offline installer here on GOG.com...yes, admittedly as a practical matter, not because I believe in what GOG is doing right now. I can take blame for that but think it's different from the Scheme/DRM support you mention.