There is hardly any hope in controlling human expression by whatever means you employ. It is like trying to stop the waves from arriving on the beach by using a toy plastic bucket.
Yeah, I'm not sure what people are really expecting from these "platforms".
At the scale of Instagram you're basically expecting them to act as a censor for billions of people. It's like imagining an agent on every street corner preventing people from discussing what they like in the pub. You might be able to influence the direction, and you might be able to use models to blanket ban certain things, but real moderation? You'd need to employ hundreds of millions.
