It's taken a while, but the longer we go down this path, the more clear it seems that it is impossible to design a content algorithm that does not have significant negative cultural side effects. This is not to say that content algorithms don't have benefits; they do. It's just that they can't be useful (i.e., designed to optimize for some profitable metric) without causing harm.
I think something like asbestos is a good metaphor: Extremely useful, but the long-term risks outweigh any possible gains.