I think there is a more fundamental philosophical gap is on why we even have a market economy. If you primarily care about private property, the American policy

I think there is a more fundamental philosophical gap is on why we even have a market economy. If you primarily care about private property, the American policy makes sense as the state only interferes when it's undeniably necessary. If what you care about is the common good and you think letting companies compete is the best way to run an economy, only the European policy makes sense: You probably consider it impossible that lack of competition does not harm the customer. Otherwise it would be hard to defend not nationalizing the sector in question.