Its a common misperception that "everyone has their entire lives uploaded", because humans are subject to availability bias. I recently spent some time living with young university students in a non-English-speaking European country, and most of them had one social media account (generally locked or pseudonymous) plus text apps. Data brokers are not able to collect and resell anything they please in most civilized countries.

Always remember that the Internet and social media are dominated by people who put an unhealthy amount of time and energy into the Internet and social media. Those people are not real, any more than the old-media commentariat and their taboos are real. Most people are much less visible because they have lives.