When your alternatives are AT&T or Spectrum aka Time Warner Cable, what are you to do? I've interacted with Google Fiber customer service maybe once since we got it 6ish years ago...prior to that, I'd be on the phone with Time Warner at one point and then AT&T once per month, because the service would break and we'd need a tech to come fix a connection, or more often they'd Jack up the price with no notice and would only decrease it if you called to complain or threaten to disconnect. Fiber has been the exact same price for 6 years and they prorate a discount if your service happens to go down, which has been rare and brief

Using the Mozilla VPN on Google Internet is the ultimate power move.

Probably but you can use a different dns provider. If you are really concerned, a vpn is the best answer to make sure they don’t get any of your information. The problem is that there aren’t very many VPNs that can do anything close to 10Gbs.

Every single isp will use data from their dns servers.