You are way off my friend. GOG is and will always be DRM free. Simply buy the game, download it, and play it on any PC you want. You can't do that on Steam, even if the game is uploaded to Steam as DRM free by the developer. Steam itself is the DRM. It doesn't allow you to back-up your game or to play it anywhere without being logged into the steam account (even if it's offline mode, it's still DRM).
From the same User Agreement you have sent me:
"In the very unlikely situation that we have to stop running GOG we'll do our best to give you advance notice, so that you can download and safely store all your DRM-free content."
In your example from 2.1 it's referred to services like streaming. The content is yours. They can't take it away. You buy the game, you download it and then you can even delete your gog account. You can play that game for your entire life, and beyond.
Look at this page from GOG, this is what they stand for: https://www.gog.com/news/the_fck_drm_initiative
, Respectively: https://fckdrm.com/