That's not enough. If your friends give Instagram and the likes access to their contacts to "find friends", then they unintentionally leak your social circle too, and data warehouses sell this info to the highest bidder, lowest bidder, and everyone inbetween, and government agencies also tap into this for mass surveillance. Even the goddamn Mastercard sells transaction histories to Google. Everything's scraped and sold, doesn't matter if you use the internet at all.

Any notion of user consent to this is ridiculous, because barely anyone understands how much is truly collected, shared and linked together from various sources, and then used and abused. That's why Google, Facebook et al fight so furiously against legislation like the GDPR that mandates informed (!) consent.