While not intended, at Facebook's age and scale, I think gross negligence is a fair assessment. That said, it seems like upthread there's questions on the validity of the report methodology, so probably standby on any diagnosis here.
I'll buy this, for sure.
With a lot of things that are built, I think the collective of engineers may need to be more thoughtful about 2nd and 3rd order effects from the decisions that are being made or not made. Emergent Systems are absolutely a thing.