I think it’s more that in countries without major social upheaval, power becomes concentrated and centralized. The lack of social upheaval allows the powerful to maintain power without overt use of force. Also, when people from those countries compare their lives to people in chaotic and violent countries, they can be made to think that a conservative system where a select few hold wealth and power is better than chaos.

On the other hand, when there’s a struggle for power, upheaval, disorder, etc. the wealthy have to use violence to maintain their hold. That opens up opportunities for socialist or communist voices to say that it doesn’t have to be like this, and that the rich have no right to use violence to maintain their power and wealth.

Not only is it not accurate, it’s also not very interesting. It means that the warriors only use duelling weapons, rarely halberds, spears, etc. because those aren’t as good as swords in duels.