I feel this is the bit that's going to be hand waved away for the sake of convenience.
I also wonder what those certain baseline requirements are going to be? Weird that they're left ambiguous.
It's probably nothing to worry about. We have a ton of precedent with Widevine that "it's okay, we'll license to anyone who meets requirements" wouldn't ever be abused[0]. It's fine, you just meet the baseline requirements that aren't spelled out yet and that might be subject to change and that certainly won't include headless or highly scriptable or experimental browsers. Nothing to worry about.
[0]: https://blog.samuelmaddock.com/posts/google-widevine-blocked...