Hardware-based attestation of the running software is an important security feature, especially in a world where data leaks and identity theft are rampant. Let's say I'm a healthcare provider, and I'm about to send sensitive medical data to a third party vendor. Wouldn't you prefer that this data only be able to be decrypted by a computer that can prove to the world it booted a clean OS image with all the latest security patches installed?
If the vendor wants to install some self-built OS that they trust on their computer and not update it for 5 years, that's their business, but I may not want to trust their computer to have access to my personal data.
Remote attestation gives more control to the owners of data to dictate how that data is processed on third-party machines (or even their own machines that may have been compromised). This is useful for more than just DRM.
Entities (ab)using remote attestation in order of 'screws over those below them':
Government > Cyber criminal groups > Large organizations > Normal people.
Do you want to live in a world where a large corp can dictate which $VERSION of $APPROVED_SOFTWARE you should be running? I think fundamentally it's just not the direction we should be going. I don't actually doubt that proper remote attestation eventually would be possible, but before then it will be possible to bypass it in countless ways. Probably eventually you'd end up with only a single software stack, assumed to be flawlessly secure.
I think, luckily, this will severely limit the usability of the technology that can work in this way. Developing for this stack will be a pain, the machine will have all sorts of super annoying limitations: can't use that display the driver is not vetted, can't use that USB webcam it might have DMA, etc. That will hopefully harm the uptake of such technologies.
Like often in tech remote attestation in your case is a technical fix for a social problem. If the problem is sharing sensitive data with institutions you don't trust then you need to build that trust, or transform the institutions so that they can be trusted. Transparency, laws, oversight, that type of stuff.