Recommended reading: Hold On to Your Kids: Why Parents Need to Matter More Than Peers by Gordon Neufeld and Gabor Mate https://www.amazon.com/Hold-Your-Kids-Parents-Matter/dp/0375...
Another great book that covers more of the science in depth is The Developing Mind by Daniel J. Siegel [2].
Sounds extreme? Read the books (and others) yourself and see what conclusions you reach.
[1] https://www.amazon.com/Hold-Your-Kids-Parents-Matter/dp/0375... [2] https://www.amazon.com/Developing-Mind-Third-Relationships-I...
Hold on to your kids[1] and instead of having to spy on them you will know them.
Yes, Parental controls could, in theory, provide many many more protections. But given the trajectory of tech, capitalism, and the USA at large (and the culture it exports), I do not see that pragmatically happening to a relevant degree by the time I have children.
[1] - https://www.amazon.com/Hold-Your-Kids-Parents-Matter/dp/0375...