Why do you think backing up an installer is anything different from backing up a folder? What do you think an installer does that’s so special?

You claim I’m emotionally attached to Steam and claim you use GoG because it’s DRM free, and yet I show you GoG is not DRM free and that Steam has DRM-free games and your answer is that “but that doesn’t count because the folder is not inside an installer”.

It’s okay that you prefer GoG, but it’s not because of them being DRM free because they’re not. It might be because you prefer your hames backed up in installer format, or you might have developed an emotional bond over the DRM free claim. You’re the one making an argument from emotion, because you feel that different methods of backup are better or worse, and stick to GoG despite the reason you claimed being false.