Understood, but the princabl3s wete the same. A young teenager America throwing it’s weight around and demanding respect.
Spain at that time had not given up the hope of reconquering its colonies which had declared their independence. The US was in no position to stop Spain if she had help from European allies, but Great Britain also wanted the Latin American countries to remain independent (so she could trade with them). So the US could make that pronouncement knowing it would not just be up to us to enforce it.