This is likely aimed at remote management tools that can perform (amongst many other tasks) remote installs of apps across fleets of machines. On Windows you'll likely find these run as SYSTEM.
If corporate systems were stand-alone/isolated, we probably would not have this problem to the extent that we do.
Well.. Yeah, but also... This is what we used to have and have been moving away from. We used to have on premise and then moved to SaaS. I'm pretty sure we all realized that had some security consequences, right?
It's sort of like building an encryption backdoor (only for law enforcement) and then to be shocked and surprised when criminals use it against you. Security technologists who know better are not consulted and/or their advice to isolate and diversify is not taken.