Yes, Intel might do that, but "circumventing the circumvention" is practically describing Intel making the change as some kind of malicious/hostile actor that wants to facilitate you being the victim of a BIOS hack. I don't think that is what is happening, but the current architecture does have undesirable consequences. Rotkowska's proposal doesn't really "circumvent" anything Intel is doing - it mainly allows the end user to assert a clean BIOS state.