Because it's the whole topic of this conversation

> "From history we know that research left unchecked and unrestricted can start leading to some really dark and horrible things. Right now I think it's a problem that social media companies can do research without answering to the same regulatory bodies that regular academics / researchers would. For example, they don't have to answer to independant ethics committees / reviews. They're free to experiement as they like on the entire population."

For example maybe next they decide to research whether they can influence body dysmorphia, or suicide