On one hand it makes sense that medieval european social relations imply, well, medieval european social relations and it makes sense to use your novel (or your show) to examine those.
On the other I can relate to many people wanting to see women in medieval fantasy to be represented in some other way than constant misery porn.
Not true. Margaret Beaufort was married to Edmund Tutor, a man twelve years her senior, at the age of twelve. She became pregnant immediately after her wedding night, and gave birth to Henry Tudor, the future King Henry VII, at the age of thirteen. She spent the rest of her life politicking for her interests and the interests of her son, getting control over her land, and pressing her son's ultimately successful claim to the throne. Daenerys being a victim of child rape and then going on to become a significant political force is perfectly in line with the real history of the War of the Roses.