Google might be pretty much okay only capturing the 99.99% of people who don't think about privacy much, and want the convenience of Google Home and centralized data. Giving a slight nod to the 0.01% might even lead to a decrease in bad PR.
Google supporting the standard is irrelevant so long as Home Assistant does. More devices in the eco system at the beginning is a plus for the health of the standard, just don't buy one of their listening devices