>> As for how: DRM-like tech in the hands of users should allow for that.

> If it's in the hands of the users, i.e. open source, it can be disabled at any moment, which is exactly what my reply already addressed.

The point is that with the help of hardware-backed DRM on the client, the Matrix server could send data only to unmodified clients. You modified your client in a way that does not match what the Matrix server expects? No data for you.

You're repeating the same thing with more words. If you cannot control your hardware-backed DRM, then Matrix requires proprietary blobs to work.