The privacy creep usually happens by building narratives around CSAM. Yes, agreed it was objectionable, but there was no "scientific analysis" that such measures would prevent dissemination in the first place. Surveillance is morally discreditable, and Apple seems to have tested the waters well - by building a privacy narrative and then screwing the users in the process. Most users believe it is "good for them". Though, it remains the most restrictive system.