Not the person you're replying to but there's a big difference between: "We allow DRM, but don't force it" to "We strongly oppose DRM, but allow it and even put it into our own games". One is just business, the other makes you a hypocrite. And the issue with GOG is that they're the latter.

See my other reply, they have allowed this much more than 4 times, and their own games have some form of DRM. Plus the amount of games with DRM on steam is much less than 99%, as a general rule if the game is on both platforms it has the same or equivalent DRM. So it's essentially up to the publisher whether a game will have DRM or not, and because the vast majority of games have the same stance on DRM regardless of platform of purchase citing GOG stance against DRM becomes a moot point.

In short, games on GOG can have DRM and games on Steam can be DRM free. And as a general rule a game's DRM stance will be the same regardless of store. So if you want to play game X and it's available on both GOG and Steam, chances are pretty high that it is DRM-free on both, and if it has DRM on steam chances are pretty high it also has DRM on GOG.