Why doesn't it follow logically? Some teens are depressed, Instagram makes them even more depressed, they kill themselves, and it's disgusting that Facebook knew about it and hid it. Seems pretty logical to me.
First of all, it's not clear that this is the case -- that Instagram makes some teenagers so much happier that it outweighs the downside.
Second, any product with the capacity to make some population of their users die or harm themselves (1% suicidal maybe leads to 0.01% of people actually attempt suicide; not counting other detrimental effects like eating disorders or depression) should be regulated for safety. C.f. cars, guns, tobacco, alcohol, food, medicine, etc. Such a product should not be under the control of one private company.
I.e. it should not be Facebook's choice to create winners and losers for those who use Instagram. We need regulation from some independent entity that is not motivated (or as motivated) by Facebook's profit. The best candidate would probably be some independent government agency.
Indeed it’s not at all clear without further study whether Instagram increases people’s happiness enough to be worth the downsides.
It is my value judgment that Facebook is disgusting, and my arbitrary desideratum for this judgment is that Facebook (allegedly) spun a narrative to cover their suicide machine.
You'd be right in saying that this line of thought is decidedly not sound; nor could it ever have been sound in the first place, because it's irrational and arbitrary. Does its irrationality and arbitrariness make it less valuable than logically sound arguments? If so, why?