Hopefully followed by Techcrunch for cookie wall without one click reject
"We use cookies and data to:
* Deliver and maintain Google services * Track outages and protect against spam, fraud, and abuse * Measure audience engagement and site statistics to understand how our services are used and enhance the quality of those service" [emphasis mine]
The last point is definitely not functionally necessary nor essential for delivering the service yet is a prerequisite - the "reject" button doesn't apply to those.