Morally I agree with you but the pessimist in me thinks that is unrealistic. I believe facebook is primarily motivated by their earnings. If an unhealthy behavior with instagram leads to more engagement, which means more ad sales, why would facebook interfere dramatically with that recipe? I won't be surprsied if they already A/B tested more "healthy" types of content with their feed and recognized it lead to a dip in engagement.
> If we should hold ourselves responsible, so should companies.
Why "should" FB do so? It is doing the "right thing" for its stake holders. Of course, Ideally they should, but realistically not going to happen.
It is us who need to protect our families because we are incentivized to do so. We have failed in protecting our own interests.
It is no different from the drug dealers in our town, we warn our children of the dangers, take steps within our means to reduce our children's interactions, etc.
Tackling this issue in a sustainable way is something I believe most companies are capable of with the right guidance.