Privacy discussions often gloss over or outright ignore the many factors that affect perspectives on privacy. Quite often this will make a stance that is perfectly reasonable to one person look like raving lunatic to another person.
Trust is one factor. Even if an individual agreed that the approach being suggested by Apple and Google is a good one, they are unlikely support it if they do not trust those businesses. Even if that individual trusts the motivations of a party, it does not imply that they trust their competence.
Social change is another factor. Whether we acknowledge it or not, there has been an enormous change in attitudes towards privacy over the past quarter century. If you took anyone from 1995 and showed them the technology of today, they would likely be amazed by our access to information and horrified by other people's access to our own information. Keep in mind that was an era when the Internet was just starting to reach into homes and the typical phone call was made from a landline. On top of that, most devices were siloed by necessity so that phone call was between you, the recipient, and the phone company. You did not have to worry about a social media company trying to mine your contact data with an app installed on your phone (because phones did not support apps and barely supported storing phone numbers). Even though we have had decades to adapt to those changes, some people are more likely to embrace their benefits while others have held on to their old values.