I wonder if they are concerned about piracy. Airplay to a non apple device and copy the video out.
With various implementation of airplay some are very likely to contain exploits
You wonder if company requiring CPU level rootkits (>=hd quality) is concerned about piracy? ;)
Could their argument not be applied to Google Cast? Almost any device can implement that protocol without certification from google afaik.
Why does anyone AirPlay Netflix today?
Audio to a HomePod. There's no other way to get (non-Apple) audio into the damn thing.