It could even grab metadate of every traffic in your wifi

Nah it’s on a separate vlan

It probably has a temperature sensor (knows when you open your windows). It probably has a movement sensor hence beeing able to grab vibration data…like do you walk around, when, how much, more than one person.

To what end?

It could also act as part of a DDoS attack or be used as a domestic ip proxy.

Maybe. Being a major brand I’m sure some network nerds would notice these kind of packets at some point. But that’s probably the most realistic.