In case you often hand over your phone to kids, they might, on some occasions, fiddle with the phone's settings and turn off Google Assistant and the OK Google command by default accidentally.
Being signed in to your Google account makes it easy to set up a new phone from there.
Set up and schedule a Routine to start anytime, so you have fewer daily chores to remember.
It even works when your phone is in vibration or silent mode.
Android is Android because of the freedom it provides.
It is an open standard that is maintained by a nonprofit organization.