Imagine being so out of touch that you think parents are generally equipped with the knowledge, features, and emotional capacity to manage their child's entire exposure to the internet in a way they cannot or will not circumvent. Laughable.
Imagine thinking parents stand a snowballs chance in hell fighting against products explicitly made to exploit their children from companies spending billions on it. It’s like 0.00001% of parents that has those skills, if that.
How is that at all relevant to the comment you're replying to. We don't need to find a single party we can apply all blame to.
I think some blame lies with whoever was paying for Facebook's internet access, and encouraged them to foist more of a predatory approach and cast a wider net than would have been possible otherwise.
There have always been so many people having higher integrity to choose from for those possessing better judgment of character.