Gore does not make mature. Language does not make mature. Middle school kids use worse language than adults, yet it's a criteria for games and movies? Get real.
In both series you're given a god-like power that separates you from the rest of humanity: in DAO it's the taint. In DAI it's the mark. In ME it's the visions. In DA2, well, Hawke actually has to work for it, and succeeds, which makes the Champion of Kirkwall the best hero of them all.
In Morrowind you fulfill the prophecy of the Nevarine. In Oblivion you're the Hero of Cyrodill - no godlike powers but you have a stroke of luck and carry the amulet of dragons (or whatever it is) for the Emperor and join the blades. For some reason everyone trusts you because you delivered it to the blades. In Skyrim you're the Dragonborn.
In all cases except DA2, the fate of the world rests on your shoulders. Hawke rose to power based on her own deeds and connections.
In DAI, the mark makes you practically a god. You were in the fade when some green woman reached down and saved you from being eaten by giant spiders. Others saw it. And you have this mark on your hand. Solas takes a wild guess and discovers it closes rifts. From then on you are the Herald of Andraste! And people started bowing. Wow, what a power trip. I am the Herald of Andraste! Bow before me! And you hold the power of life and death of people in your hands. Will you be a balanced ruler, a soggy piece of bread, or off with his head?
Of course, Daenerys Targarean is pretty much like a goddess in GoT with her fire immunity and pet dragons, but my guess is that she can still be killed. Everyone can be killed.
But in DAI you have to save the entire world from destruction. It rests completely on your shoulders. You. And you get to shape the world afterward.
Of course the reason games have these power trips for the players is because we, the peons of society have such little power in our every day lives. We practically have to ask permission to use the bathroom during our shifts at work. They can make us pee in the cup randomly to see if we're using anything that's on our company's forbidden list. We saw our retirement plans evaporate in 2008. Don't say they bounced back, because some got cashed in for living expenses after the economy tanked. And to give you an example of how tough it is today.... my parents (now deceased) bought their house in 1950 for $5000. My father was making $5000/yr. as a machinist. The house was the size of a $200,000 home today. A $40,000 home was almost a mansion. Puts things in perspective. This is why we have power trips in role playing games. They're an escape from our real lives.