That's because most people are evil, pretending they are not responsible for their own lives. Only responsible stewards are gonna safeguard Bitcoin to a high degree. This is why Luke is wrong about needing 85% of users to run a node and Mechanic is right that a much smaller number will do. We should be appealing to the most responsible, logical people by giving noderunners the respect for their autonomy and choice and capability to run responsible policies, and not expecting your everyday douchebag to know what's good for him.