To put it more succinctly, in the zero-trust mindset it isn't ever _your_ network.
It's a network you happen to be connected to. Your only trust the network at the physical layer that it won't destroy your hardware. Beyond that you don't trust anything you receive over the network that you can't independently verify.
For end users, zero trust looks like ‘not needing to check the VPN icon is green before you launch the payroll app’.
The concept of ‘being on the network’ goes away. Which is good, because that was a major source of confusion for end users.