And CRTs dont???

As soon as you use a digital input you lose any real latency advantages. Plus modern digital displays have such low latency the difference really doesn’t matter.

There is no meaningful data for the OS to capture if it used as a display for externally connected devices.

Except that some of these devices are periodically “screenshotting” the screen and harvesting data from that.

Pair that with automatically connecting to open wifi networks and nothing is truly safe.

Sorry, this is an AppleTalk household.