What does healthy parenting look like then?
You might as well have said that you need to be a police officer to make sure your child isn't hit by a drunk driver, kidnapped by creeps or attacked by someone on the street. Children are under the care of parents or guardians for a reason. It's not to fist fight criminals or design their own security system.
With tech, we've largely abdicated that, placing the entire burden on parents to defend against industrial-scale manipulation.
Expecting individual parents to successfully counter industrial-scale behavioral engineering is a systems failure, not a parenting failure.