I fully agree, but people are often capable of knowing something abstract is true in general (web is full of tracking), but often fail to make the cognitive step to apply those facts to the specific case (there is tracking on porn sites).

Nearly 20 years ago I worked as a Dell phone support technician for a few months and it was the best learning experience I've ever had in terms of understanding what the "average" person can actually comprehend. I think many technical people have experience with non-technical people who are otherwise fairly educated and clever (eg parents/grandparents), but there are a lot of people who have difficulty with the concepts, let alone the details. I think those people still deserve privacy.