Are you a Facebook employee? Your justification sounds a lot like the internal propaganda that is being fed to employees. “Facebook is net positive”, “it’s just a tool”, etc
What makes you say that? I think it's a good argument, doesn't mean it's right but it has substance. You also have some quotes that I never said. Nowhere did I imply it's a net positive. It is like a tool however but it has much more input.
The argument was that Facebook is neutral as a platform. Similar to the internet, it serves all kinds of content. Some of the content is good, and some is bad. That doesn't necessarily mean the platform is good or bad.
Having worked in growth before (not at Facebook), I can tell that you vastly underestimate the impact FB teams have on how/when/what/for how long/how many times/etc content is displayed to end users. This is absolutely not a neutral impact.