Facebook is just driven by the power of 'Big Data' and that's not going away anytime soon - it's everywhere now and in many cases without a identifiable brand.
I've had a few friends who recently did the facebook download of data held and they were horrified. How did facebook know they used the corner chippy, how did they know which garage serviced their cars etc. They were apoplectic with rage over this gross invasion of privacy etc.
Once they calmed down, the rational explanation was they had provided their contact details to the businesses concerned - freely. The businesses concerned had facebook pages and the businesses had uploaded the list of their contacts (a conscious process - they decided to). It's all information they had willingly provided at a point in time, but because Facebook had surfaced the data in one place - oh the horror!
The reality is you are still in control over what you share (either by giving your email address to the corner shop, or sharing the details of the latest car you bought on twitter). Whether that's good or bad is entirely a personal decision. I couldn't care less if the world knows I shop at Sainsbury's, but someone else might. I do care whether they know I have a fetish for chocolate-chip-chicken burgers wrapped in gold leaf, so I keep that to myself (oh bugger!). The point is I'm in control - and GDPR further improves the situation.
I don't think it's a case of social media is evil - lots of good has come from it, but also lots of bad too - for me the constant pressure on the young-un's today is an issue - and the answer for some will to be stay away, but that's not the answer for all.