[Dylan16807]

Not "because".

Dedicated wakeup chips can be designed to have a different matrix shoved in for the word they're detecting. Google presumably did not do this, but they could have.

[bobsmooth]

Adding more communication between the main chip and the wake-up chip would leave more room for privacy intrusion.

[ethbr0]

It's not more communication: it's different read-only data in the wake-up chip.