I think that's the point
This isn't about "how to hack Windows", it's a call for ideas on how to make Windows more hack-proof.
In my opinion, one could start by taking a cue from Linux, where individual services and applications do less, and do those few things better, then communicate to other services and applications. The air gap in between makes it harder to exploit, since there's less code running at the attack vector to contain exploits. And, it's easier to run exposed services at lower privilege levels, letting other code handle the (untrusted!) data given by the edge software.