Why not use the google assistant library as an assistant?

Hi everyone, I’ve always wondered why the Google Assistant library Sdk was never added to Home Assistant, which has the built-in hotword “hey google” and works very well on Raspberry even from 3 meters away and is super reliable. It’s true that the library is currently deprecated but it’s still working. I use it on a Google AIY kit that I got some time ago.
it would be nice if it were integrated by default so that the user can choose whether to use local commands or rely on external services, also considering that this way the Google Home Mini devices will also be eliminated as the Raspberry will take care of doing all the work .