Why do people support the monarchy, when they get their roles simply through birth?

Britain’s constitutional monarchy is one of its greatest strengths as well as one of its greatest attractions. The monarch is detached from party politics in a way no president could be. For years, the existence of a monarchy was the guarantee that no would-be dictator could stage a coup by deploying troops, as the monarch controls the armed services. No latter-day Cromwell could win power by force. We have had no civil war since Cromwell’s and much of that is due to having had a constitutional monarchy as a focus of loyalty.