No, it's about defaults in behavioral economics. The vast majority of people won't change the default settings on their devices.
https://www.centenecenter.wustl.edu/by-the-power-of-default-...
https://www.centenecenter.wustl.edu/by-the-power-of-default-...
No it isn't implied.
No, it's not. "Consent" requires being informed first.
Willful, informed, enthusiastic consent is what we're after.