Most of the people someone interacts with are not someone they already have a close relationship with. E.g. if I move to a new city, the clubs that I need to interact with to establish a social life are probably using big tech. If I need to buy or sell a couch, the people that I need to interact with are probably on FB Marketplace.

Certainly there are things that people can do to be less reliant on big tech. However, being a part of society still requires a lot of reliance on big tech.