Major
gallons of Cupertino kool-aid drinking going on there.
HomePod -
ZERO Ethernet connectors.
AppleTV -- 1/2 the line up again
ZERO Ethernet connector. Other 1/2 , is composed of a turn of the century 1 GbE connector. ( How many Wi-Fi 7 routers are dropping onto market with a single, decades old port? 2.5GbE (or b etter) is common there. For example. recently annoucned Eero 7
"... Ideal for internet plans up to 2.5 Gbps with two auto-sensing 2.5 GbE ports and wireless speeds up to 1.8 Gbps. ..."
) It is pretty clear Apple would like to put the cheapest Ethernet connector they can get away with on the AppleTV. ( 'none' is certainly cheapest). Cheapest connector isn't going to make for a viable modern router.
To be a 'router' to the Internet , the device needs to connect to a modem. Modems have Ethernet ports. So that is just a extremely fundamental requirement for systems in that market.
Apple's major interest in doing their own Wi-Fi chip is more likely grounded in getting rid of
more wires. Not enabling devices with them. Apple is looking for more excuses to drop Ethernet off of
more devices. (e.g., Wi-Fi 7 Apple TV is in more danger of
loosing Ethernet across the whole line up, than keeping it. )
P.S. AppleTV being a broader Thread/Matter router perhaps. But general Wi-Fi probably not.