What is the practical difference between "person A being obliged to do something for B", and "B being entitled to something from A"? If you universalize your m

What is the practical difference between "person A being obliged to do something for B", and "B being entitled to something from A"? If you universalize your moral obligation, then we end up with a system that is in practice no different than everyone feeling entitled to things from others. That you choose to handle yourself in that manner is great, but you cannot universalize it without creating a society of entitlement.