The clear, obvious root cause is that humans have a deep tribalistic streak. I would love to hear a solution to that that doesn't involve invasive action to educate people in early childhood. A baby step in that direction was integrating public schools, and to this day a major political party is still trying to reverse that simple measure.
What you're arguing in favor of is addressing problems from technical debt by adding more technical debt on top.
The corrective action is to perform a root cause analysis and fix things at the root.