Or it could be that the Tories/NHS are trying to scrape some egg off their face for being so fucking stupid and cheap as to keep running XP.
The general public is a bit more forgiving when you're taken down by a nation state rather than a bunch of criminals preying on a deliberately unlocked door.
Microsoft, probably being mildly cognizant that you don't win new contracts by accusing lucrative customers of rank fucking idiocy especially when it's true, will naturally play along with the conspiracy theory, especially since the chances of strong evidence pointing to the actual culprits coming to light are so low.
The general public is a bit more forgiving when you're taken down by a nation state rather than a bunch of criminals preying on a deliberately unlocked door.
Microsoft, probably being mildly cognizant that you don't win new contracts by accusing lucrative customers of rank fucking idiocy especially when it's true, will naturally play along with the conspiracy theory, especially since the chances of strong evidence pointing to the actual culprits coming to light are so low.