Stop parroting the corporate propaganda that put us into this stupid situation in the first place. Having root access on devices you own should be a fundamental right, as otherwise it's not ownership.
These restrictions extend outside the particular device. It must also be illegal as a commercial entity to enforce security schemes which involve remote attestation of the software stack on the client device such that service providers can refuse to service clients based on failing attestation. Service providers have other means of protecting themselves, taking away users control of their own devices is a heavy handed and unnecessarily draconian approach which ultimately only benefits the ad company that happens to make the software stack since they also benefit from restricting what software users can run. Hypothetically, they might be interested in making it impossible to modify video players to skip ads.
But even the DRM that is already there often only uses copyright laws as suggestions. E.g. YouTube's takedown guidelines are defined through their TOS, not through the DMCA.
Watching copyrighted stuff on general purpose computers is a very new phenomena, and it's still quite atypical IMO.