I don't see the problem. He's offering a completely legal product to an eager audience. If people want to propose banning social media in some capacity, that could and should be voted on-- but Zuck isn't violating any legal or moral law I've ever heard of, and he shouldn't have to guess what products will be illegal in 20 years and preemptively withdraw them.
If it's harming your mental health, stop using it. The "Delete App" button is right there.
The main discussion here about offering this for kids. So, no! "if it's harming your mental health, stop using it" is not appropriate.
Same with asbestos, I mean what could go wrong in 20 years?
I mean, you realise that legal over the counter heroin used to be a thing, right? Cigarettes are still legal. There is a gap between “obviously harmful thing is legal” and “it is ethical to make great piles of money out of selling the obviously harmful thing (to children, at that)”. The CEO of Phillip Morris, say, isn’t doing anything illegal, but they are a _bad person_ who is knowingly harming society. Same for Zuckerberg.
Not everything that's legal is good. One presumes that if it's found to be bad and Congress isn't extremely corrupt (as if) it'll become illegal.
What is a "moral" law as opposed to a "legal" one? If he is actively promoting a harmful product, I think that would fall into many people's definition of 'morally wrong'.
(I'm basing this on the headline because the article is paywalled)
And just stop buying those cigarettes. This is where cultural differences matter, the US has much less concern about the negative societal impact of products than many countries, particularly its erstwhile allies. It's also precisely why it's imperative other countries decouple from US owned social media unless they want to import US values.