Dynasties in Democracies

Some of my earlier posts may indicate my distress at the dynastic politics. Now Now I am not changing my attitude here. Dynasties especially in politics which is all about power are especially bad since they embody essentially the earlier dynastic monarchy principles.
Dynastic tendencies are apparent in so many other spheres. Privately held companies often suffer from a "business in family" syndrome. Professions especially those related to "brand for life" based on personal relations like medicine, law especially and some pure clientele list based like architects and all also have dynasties. In law and medicine its because its very easy to inherit clientele while in other cases its because a certain amount of trust builds over time of the brand and unless the progeny does something to tarnish the brand its usually simple to merely continue with the business relationships.
Politics on the other hand is not such a personal thing. A politician essentially takes decisions that affect everyone within that control group (some say most politicians these days work in a way that affects everybody else within the control group, but i digress). In the days of hereditary monarchy, well all the lines bad? Depends really. In case the empire was strong you might often find some rulers ascending that were not so good. But usually the very nature of earlier system was that if the dynasty didn't mend itself, soon someone will replace it. Hence some amount of natural selection was always in play.
Even India's caste system with its brutal suppression of individual will, still saw some spectacular works when in came of skill based castes. The Gupta period arts and architecture is a tribute. Why would it happen? The key apparently lied in the fact that since the poor kids had no choice of profession left, they picked up the parental profession. And the parent put their heart out in teaching their children their craft since more skills often meant more money (or your only chance of a full square meal). Go to one of those craft villages in Rajasthan and all and you can find very young children churning out great pieces of furniture/paintings etc. again because the activities are happening around them all the time and once kids start playing with tools they master it very fast.
Can it be that in the same ways politics run in family because well at top level the kids see master politician at work all the time and learn much better than an outsider that have to figure out things on own? Its also a critical help that the network for politico kids is already made ( a key reasons lawyer families do so well). So is dynastic politics good? By vilifying the dynastic politics are we actually denying the freedom of choice for politico-kids?
My real issue with the Congress brand of politics is not that the sons and daughters and wives and daughter in laws get into politics. Its with the ways and motives it is done. No one really grudges Indira Gandhi her ascendancy to power some years after Nehru. The reason is because in her case she was already active in politics and her claim to power came after she had build a base of her own. Compare that case to Mrs Sonia Gandhi. She was offered the congress presidency after her husband's tragic murder. and she has 0 political experience in terms of public life (no one knows if she was not advising Mrs Indira Gandhi nee Nehru and Mr Rajiv Gandhi over dinner table, but she had done no work as a congress worker). Similarly Rahul Gandhi and Priyanka Gandhi were talked as future prime ministers of India without even a college election to their name forget any sort of grassroots work.
Here a demonstrated ability was not the key to success. it was pure name. That happens only in powerful dynastic monarchies. A lawyers has to pass exams, become a member of the bar before getting into father's (or mother's practice). A doc spends an exuberant youth buried in books before being allowed to see a patient. Where is a similar demand of proving one's skill to able hold power and mobilize people in these political dynasties?