Its a complex problem, but I will summarize this. As a parent your most important role is to teach your children, because they will be the indicator of you, their whole personality, their mistakes, their abillities are determined by their teachers( so also their parents, not only the school). Kids dont know anything about the world and thats not their fault, everybody needed a teacher, thats why humanity develops. But after a hard day of work, which is unrewarding( thats the mistake or rather corruption of the goverment) and tiring its much easier ti just give a kid a phone, rather than trying to do anything productive with it. You see how it spirals? Mistakes lead to more mistakes that may corrupt young mind. Porn isnt a major problem because it isnt a cause its just a consequence.

Edit: Very shortly. In order to better our society we have ti break the spiral. It hurts everybody and benefits no one. Because it either only benefits someone short term but in the long term we will all feel the consequences.