The issue is that there are a lot of situations where a file can not legally be copied, saved or shared, and a screen shot by these systems would be considered that. It’s not that the files would be impossible to save or copy as is, but it’s not legal to, and having a system that might due it without human input is a massive legal liability.

Even if companies in such a situation turn off the system, there is no guarantee that windows won’t at some point push an update that activates recall on systems that had previously opted out of using it, or even reinstall it on systems that had physically removed the program from their system. Such as was done with programs like edge and Cortana.