Microsoft wants to make using older versions of Windows as annoying as possible for IT departments, to try to push us to move to Windows 10.
Corporate IT departments tend to be the biggest holdouts for moving to new versions of Windows. If a business is running fine on Windows 7, there is ZERO reason beyond security updates to move to Windows 10. Now they're giving us an artificial reason: If a rolled up update breaks something, we have to roll back the ENTIRE batch. Even any included security updates.
Microsoft wants their licensing revenue, and they want fewer versions of Windows to support. This is their play.