Google can do what they want but they handle this poorly in my opinion. First of all they seem to apply the adblocker checking at random instead of on everyone

Google can do what they want but they handle this poorly in my opinion. First of all they seem to apply the adblocker checking at random instead of on everyone. They won't do that because they know it'll cost them. Secondly, I use Safari and can simply 'reload page without content blockers' to allow ads and disable the extension on the current page - Google doesn't accept this. You have to fully disable your adblocker extension at the browser level before they'll let you back in. They are 100% doing that so that you stop blocking Google ads on non-Google sites.