Steam's new disclaimer reminds everyone that you don't actually own your games, GOG moves in for the killshot: Its offline installers 'cannot be taken away from you'
2.1 We give you and other GOG users the personal right (known legally as a 'license') to use GOG services and to download, access and/or stream (depending on the content) and use GOG content. This license is for your personal use. We can stop or suspend this license in some situations, which are explained later on.
GOG has the same drawbacks as Steam without any of the useful features. They should cut down on their "owning games" lies and spend time improving their platform instead.
It does not. You can download and backup all your GOG installers, making the games functionally equal to games you purchased on CD ROMs back in the day. They can revoke your license all they want, they wouldn't be able to keep you from using the software you acquired this way. That makes all the difference.
and to download, access and/or stream (depending on the content) and use GOG content.
Which they define as:
1.3 Also, when we're talking about games, in-game content, virtual items or currency or GOG videos or other content or services which you can purchase or access via GOG services, we’ll just call them “GOG games” or “GOG videos” respectively and when we talk about them all together they are “GOG content”.
The license is with regards to "GOG Service", not "GOG Contents". You need the former to get access to the latter, sure. But what isn't clear about this?
You still own the contents (though, as mentioned, individual titles may have additional blablabla). If you don't think this distinction makes sense when it comes to GoG vs Steam, then maybe you're just discussing something entirely different?