Mahabharata is a political saga of royal family. As is Ramayana and other Puranas.
Men and Women both involved in politics. As that was the only way they ensured their relevance and in many situations their happy existence.
It took Queen Elizabeth II to break the norm of male primogeniture in 2012.
Otherwise it was always the eldest physically able maLe child who attained power.
Only if there was no male heir was a woman able to gain the throne and only in very exceptional circumstances.
But women were political even if they didn't become kings themselves.
The most powerful position in any kingdom after the king was mother of next king (future queen mother).
King himself though powerful was limited to a great extent by the council of his ministers and commander in chief and chief religious authority in the kingdom. This was true not just for Indian history but Romans Greek Asian Kings Mongols and European Kings too
It was important for kings wives to have sons to draw their power not just from the king but also the council who would defer to the mother of future king. It was for the council members own selfish interests to ensure their and their children's continuity in the Royal court
Kaikeyi tries to subvert the system using Dasrath's two boons to get the throne for Bharat and get Rama exiled. That was not just for the sake of her son but as much for herself as being King's favourite in bedchamber doesn't mean any power. Mother of King does which is what Manthra tells her.
But playing politics to seek power is an option. Some people chose it some don't.
Kaikeyi chose to, Sumitra didnt. Sumitra could have if she wanted too, and at that point having two sons would have made a difference
Gandhari in her frustration of not being able to have a son actually hurts her own womb
Similarly Kunti and Madri also were in a race for supremacy. Where the finishing line was number of sons. Madri does make her desire to have supremacy over Kunti clear and Kunti was smart enough to realise it and nip her ambitions.
I am watching the Turkish royal drama Magnificent century based on Sultan Suleiman's reign and his concubine's rise to power as regent. It's the same story of politics and power mongering.
Unfortunately it's soapy and melodrama, there are no war or battle scenes.
But it actually does show what we call as petticoat politics.
Political strategies played out by women to gain power in world ruled by men.